Emu Hojo

Emu Hojo (宝生 永夢 Hōjō Emu) is one of the main characters and the main protagonist of Kamen Rider Ex-Aid. He is a trainee in pediatrics working at Seito University Hospital and a genius video gamer who goes by the alias M. He was given a Gamer Driver and the Mighty Action X Gashat by Asuna Karino to become Kamen Rider Ex-Aid (仮面ライダーエグゼイド Kamen Raidā Eguzeido) and destroy the Bugster viruses, to save his patient's life.

History
When he was only eight years old, Emu was involved in an accident, leaving him critically injured. After receiving emergency surgery, Emu was given an handheld video game device by one of the doctors as a reward for hanging on. This event would inspire Emu to become a doctor and help children like the one who saved him. How exactly he was saved is unknown, but this surgery appears to have also given him the necessary abilities to use the gashats and gamer driver, as revealed by the doctor who had saved him, now the Deputy Director-General of the Ministry of Health, Kyotaro Hinata.

Emu would later on win numerous gaming tournaments under the gaming alias of M, earning the interest of Asuna Karino as a potential candidate for using the Gamer Driver. After one of these tournaments, about six years before he became a Kamen Rider, Emu was captured by Michihiko Zaizen and the Next Genome Institute. During his capture there, they performed experiments and surgeries on Emu, injecting him with the Bugster virus in an attempt to bring the Bugster virus into the real-world. During their last surgery, they were able to properly infect him, but at the cost of disappearing. A couple days later, Emu was rescued, and he suppressed the memory of these events in to what appeared to be a dream.

Emu went on to become a pediatrics intern at Seito University Hospital. One of his patients, Sota Suyama, refused to be treated for his unknown illness and attempted to escape. While trying to catch Sota, Emu ran into Asuna, who was bringing the Gamer Driver while searching for M. When Sota suddenly collapsed, Emu and Asuna noticed unusual lumps emerging from the boy's neck. Not explaining Sota's condition to Emu, Asuna had the latter bring Sota with her to CR. Much to Emu's surprise, the hospital director Haima Kagami was there as well, ordering the intern to stay out. However, Emu disobeyed, hoping to make Sota feel better by bringing him to the release of the Mighty Action X game. Asuna ran into Emu and Sota at the game (believing that M would be at the press release), much to her frustration. However, when she tried to bring Sota back, he suddenly howled in pain and transformed into a Golem-like monster.

Emu finally got Asuna to explain Sota's condition: he was infected by Bugster a computer virus threatening humanity, which could only be stopped by someone capable of using the Gamer Driver and destroying the virus. Determined to save his patient, Emu took the driver (and the accompanying Mighty Action X Gashat) without permission. Much to Asuna's surprise, not only was Emu able to become a Kamen Rider and extract the Salty Bugster from Sota, but he was, in fact, the gamer she was looking for. After transforming into Level 2, Emu defeated the Bugster, saving Sota's life. After checking on the boy, Asuna finally allowed Emu to access CR, and revealed her identity as Kamen Rider navigator, Poppi Pipopapo. She christened Emu as Kamen Rider Ex-Aid, and stated that he must become the super doctor to save humanity from Bugster.

Shortly after getting acquainted with CR and reaquainted with Haima Kagami, Emu met Hiiro Kagami, Haima's son and a genius surgeon, who was working at a prestigious American hospital before being called back to the fight the Bugster as Kamen Rider Brave. Hiiro wasted no time in patronizing and antagonizing Emu, saying the latter's presence was a "No thank you". This caused Emu to doubt his worth to CR. Emu's inexperience became apparent while handling the next patient, Rensuke Natori. Emu went to Level 2 immediately, not realizing he needed to be in Level 1 to extract the Bugster. The Aranbura Bugster was quickly extracted by Brave, but both Ex-Aid and Brave were attacked by the mysterious Kamen Rider Genm, allowing the Bugster to escape and leaving Rensuke in critical condition. Emu was bewildered and disgusted by Hiiro's callous approach to patients: seeing them as just things to fix, and was more concerned with eating cake than Rensuke's well-being.

Hoping to buy time by reducing Rensuke's stress, Emu went to Rensuke's ex-fiancé, Asami, to find out why she called off the wedding. Their discussion led them to the church planned for the ceremony, where they were attacked by the Bugster. Emu transformed into Ex-Aid Level 1, but the Aranbura Bugster threatened to kill Asami if he changed to Level 2. Ex-Aid and Asami were saved by Brave's interference, and the two Riders managed to defeat the Bugster (Brave finished off the Aranbura Bugster). Emu's actions helped Rensuke and Asami restore their engagement. The incident prompted Emu to stay in CR, as he wasn't willing to leave patients in the hands of a doctor who didn't care about them.

Emu ran into a paradox with one of his patients: a boy named Yuki Kitami who, as the result of an operation, had an irrational fear of doctors.

Emu followed after Yuki when the latter tried escaping from the hospital. Soon after he cornered Yuki Emu realized that the boy was infected by Bugster. In an effort to remedy the situation, Emu took off his doctor's jacket and called Asuna for backup. However, a mysterious man in doctor's attire appeared, aggravating Yuki and causing the Bugster to take over his body. The man turned into Kamen Rider Snipe Level 1 and quickly extracted the Revolve Bugster. Emu helped Yuki get to safety, running into Asuna along the way. Yuki's fear of doctors caused the Bugster to regenerate quickly. Emu transformed into Ex-Aid Level 1 in an unsuccessful attempt to stop Snipe, eventually retreating with Yuki and Asuna hoping to calm the boy down.

After getting Yuki to CR, Asuna and Kagami explained that the man who appeared was Taiga Hanaya, a former radiologist and the rider chosen for CR during Zero Day, the initial Bugster outbreak. Failing to convince Yuki that he was safe, Emu got Taiga's location from Poppi, hoping to at least reduce Yuki's stress by convincing Taiga to stay out of the way.

Taiga refused Emu's offer, explaining that he would do what he wanted and his desire to get all ten Gashats to destroy the Bugster. He then challenged Emu to a duel: whomever defeated Revolve would get the others Gashat. Their discussion was interrupted by the Bugster viruses attacking them, but Emu agreed to the duel after he and Taiga transformed into Ex-Aid Level 2 and Snipe Level 2, respectively. The fight was interrupted by Brave, who attacked Snipe in an attempt to take his Gashat. Ex-Aid snapped them out of their fight after reminding them that Yuki's life was at stake.

Yuki's high stress only strengthened Revolve further, draining Ex-Aid and Brave's Rider Gauges with a brutal artillery assault. Rather than de-transform like Brave, Ex-Aid put himself directly in the line of fire, risking getting a lethal Game Over in order to get through to Yuki. Using an Energy Item, he wiped out Revolve's troops before seemingly taking out the Bugster. However, the game remained in progress: it was revealed that the real Revolve had hidden itself before Snipe finished it off. Having lost the duel, Emu's Gashat was taken by Taiga. However, Emu was simply relieved that Yuki was safe.

Sometime after losing his Gashat, Emu was confronted by coroner Kiriya Kujo, who had brought a Bugster victim, Yoshitaka Nishiwaki, with him under the guise of the former being a patient (claiming to be six in the appointment). Much to Emu's shock, Kiriya offered to get his Gashat back. Calling Hiiro to perform the operation, Emu confirmed Nishiwaki's condition and attempted confronting the patient. Hiiro and Asuna arrived for the operation, followed quickly by Kiriya and Taiga, the latter coming under the pretext of a duel. Nishiwaki was quickly taken over by the Bugster, with Kiriya and Taiga turning into Kamen Riders Lazer Level 1 and Snipe Level 1 to extract it.

After the Motors Bugster was extracted from Nishiwaki, Hiiro transformed into Brave and attacked Snipe. Lazer took the opportunity to steal the Mighty Action X Gashat back for Emu and turned into his Level 2 form. Much to everyone's shock, Lazer's Level 2 form was a motorcycle. This explained why Kiriya reached out to Emu: Lazer needed a rider to reach his top speed. Much to Lazer's chagrin, Emu focused on getting Niskiwaki to safety first, allowing the Bugster to get away.

Once Nishiwaki was in CR, he explained that his sister Riko had been kidnapped by another Bugster. Emu promised to save both him and his sister before finding Kiriya. Kiriya offered his friendship to Emu, who accepted. Lazer and Emu challenged Motors to a race, and after a heated and close fight, the two were able to defeat Motors and save Riko. As soon as Riko was safe, Lazer threw off Ex-Aid and denounced his friendship, admitting that he was only after getting a sample of the Bugster due to his curiosity. Unfortunately for Lazer, Motors was destroyed by Genm, who promptly turned into Sports Action Gamer Level 3 to attack the other Riders, depleting their Rider Gauges with the Shakariki Critical Strike.

Searching for the Shakariki Sports Gashat which he needed to save the world, Ex-Aid arrived to fight a pack of Bugster Viruses which were being fought by Kamen Rider Ghost in defense of Ayumu, the mysterious boy who held the Gashat. Mistaken for an enemy by Ghost, whose friends had been attacked by his doppelganger, Ex-Aid found himself attacked but was quickly able to reason with his fellow Rider as he explained that he wished to save lives - the most important thing of all - by changing fate, a sentiment which was respected by Ghost. Alongside Ghost, Ex-Aid tended to Ayumu as they were attacked by his doppelganger, Kamen Rider Genm, who took the Gashat before leaving as soon as he came. Ghost apologized but Ex-Aid assured him that it was alright for now as Ayumu was safe. After defeating a further horde of Bugster Viruses together, Ex-Aid predicted to Takeru that they would meet again soon before leaving him an Ex-Aid Ghost Eyecon as a gift as he took his leave, with Takeru noting that he had connected to another person's feelings.

Emu ran around the street, wailing because he's waking up late and that he'll be late to work. Suddenly, a hooded man asks for his help, and Emu stumbles upon a pile of trash before coming to help. After Emu scans him using his special stethoscope, he is about to transform when Asuna and Hiiro arrive. They both warn him that his patient is actually a thief who stole all newly developed gashats (Gekitotsu Robots, DoReMiFa Beat, Giri Giri Chambara and Jet Combat). This shocks Emu, but regardless of that fact, Emu still wants to cure him. However, a sudden quarell with Hiiro allows him to escape. When the trio gave chase, a new Bugster arrives, with the Gekitotsu Robots Gashat installed on it's head. Emu and Hiiro transformed into Ex-Aid Level 2 and Brave Level 2 to fight the Bugster. However, the Bugster is powerful enough to deplete some of Ex-Aid and Brave's Rider Gauges. To make things even worse, Genm in Level 2 appeared and transformed into Sports Action Gamer Level 3 before beating Ex-Aid and Brave. Genm himself had vanished along with the Bugster. While Emu was busy searching the patient, Kiriya appeared and said that Genm's true identity is the patient himself.

Back at the CR, Emu meets Kuroto Dan and they exchange a rather warm welcome. Emu is still not wavering about his choice to save that patient, but Hiiro, sick of Emu's idealism, grabs him by the collar. Emu angrily states that Hiiro wasn't a doctor before he fled to a helipad. There, he was confronted by Dan again. Emu explains that he just can't let the patient become a Bugster. Dan compliments him that his heart is like a shining crystal, but once a malicious patient shatters it, the crystal won't able to shine again. Emu states that he'll save the patient anyway, since he'll regret if he even abandon his patient, before giving chase to the patient again.

At an Avenue, Emu confronts the Collabos Bugster. Suddenly, Hiiro, Taiga and Kiriya appeared. Taiga challenges them all to a game. Whoever claims the Gekitotsu Robots Gashat gets to keep it as a prize. However, Kiriya states that he has other business to tend to, as Genm appeared, already in Level 3. Hiiro, Taiga and Kiriya transformed into Brave Level 2, Snipe Level 2 and Lazer Level 1 to fight Genm and the Collabos Bugster. However, to make things even worse, the patient, using the Gashacon Bugvisor, transformed into the Graphite Bugster. An enraged Snipe attacks Graphite.

Without breaking a sweat, Genm & Collabos manage to deplete Brave and Lazer's Rider Gauges, effectively cancelling their transformation. Snipe also unable to defeat Graphite, also cancels his transformation. Genm then chokes Emu, provoking him. Genm states that Emu's idealism doesn't work on the real battlefield. For Genm, Might makes Right. This statement finally causes Emu to snap, transforming into Ex-Aid Level 2 out of rage.

Shortly, using Mighty Critical Finish, Emu destroys the Collabos Bugster and claims the Gekitotsu Robots Gashat. Using the newly acquired Gashat, Emu transforms into Robot Action Gamer Level 3 and finally beating Genm. However, Genm manages to flee, with Emu roaring in rage before cancelling his transformation. Everyone Gathers for a Clashing Crash!

Emu comes to Genm Office and hand Gekitotsu Robots Gashat back to Kuroto Dan. Dan politely refuse, and say that since Emu's the one who win the Gashat fair and square, he could keep the it. Emu thanked Dan before leaving to meet a victim of Robots Collabos attack. Uberknowst to him, Dan already record his Level 3 data for later use.

Emu and Asuna later seen at Kiyosora to meet the victim, Seiichi Kuboyama. Seiichi Girlfriend, Yoko ask for a Break in their relationship which Seiichi half halfheartedly agree before he left. Suddenly, Yoko fall down, already infected by Game disease after Emu checked her using his Special Stethoscope. Hiiro suddenly appeared and decide to operate Yoko, much to Emu chagrin. After Yoko turned into Bugster Union, Hiiro transformed into Brave Level 1 and quickly extract Yoko from the Bugster. Graphite, in his human form soon make his appearance and confront the doctor riders. He claims that he'd infect Yoko using two game viruses (Gekitotsu Robots & DoReMiFa Beat), and this prompt Emu to join the fray as Ex-Aid Level 1. Beat Collabos then attack Ex-Aid and Brave using Rhythm based attack. Ex-Aid manage to get a perfect, but Brave get a miss and Damaged in process. After Graphite assume his Bugster form, Ex-Aid changed into Robot Action Gamer Level 3, while Brave into Level 2. Snipe in Level 2 also comes not long after, but Graphite use Gekidoryuga and severely damaged Brave and Snipe (Although they do attempt a counter attack) while Ex-Aid is barely holding on. Before Ex-Aid and Graphite could battle any further, Genm Sports Action Gamer Level 3 appeared and order Graphite to retreat, which the latter begrudgingly agreed.

After they all cancel their transformation, Emu stop the quarrel between Hiiro and Taiga, also overheard about Hiiro late Girlfriend, Saki. After he and Asuna brought Yoko to CR to be quarantined, Emu heard from Haima and Asuna about Hiiro past five years ago. Then, Emu and Asuna goes to check Yoko again. Yoko Explained that Seiichi tried to join a famous orchestra, but always failed in every audition. That's why she want to keep her disease a secret, so that Seiichi could concentrate on his next audition. Suddenly, after he receive the bugster coordinate, Yoko become stressed and beg Emu to save Seiichi. Emu Promise that he'll save both Yoko and Seiichi before he left.

Shortly, Emu manage to confront Beat Collabos by transforming into Ex-Aid Robot Action Gamer Level 3, while Hiiro's still busy with his personal Vendetta against Graphite by transforming into Brave Level 2. As Graphite's about to finish Hiiro off, Ex-Aid jumped in front of him and took the damage, effectively cancelling his transformation. Emu then told Brave about Yoko current condition and relate Saki with Yoko, as he believe that Saki's keeping her Game disease a secret in order to let Hiiro continue his study without worry. Emu was later carried by Asuna as they witness Brave defeat Beat Collabos, acquire DoReMiFa Beat Gashat and use the new Gashat to change into Beat Quest Gamer Level 3 and defeat Graphite.

At some point after gaining the Gekitotsu Robots gashat, Ex-Aid fought against a couple of kaiju, and met FoxMask in the process. After defeating the kaiju, Emu explained how the Gashats worked, and what he knew of the of the Bugster virus to FoxMask, before running off, remembering that he had an operation that day.

Emu and Hiiro transform into Ex-Aid and Brave Level 1 as a giant serpent dragon Bugster Union with a head on each end forms from the patient. Director Kagami quickly sees the battle could wreck CR's patient ward and indicates (through a soundproof window) to move the fight; Ex-Aid uses his Driver's Stage Select to relocate them to a rocky shoreline. The Riders defeat the Bugster Union, releasing a pair of Collabos Bugsters, the Giri Giri Collabos and the Jet Collabos, but Genm Sports Action Gamer Level 3 arrives, prompting the Riders to take their Level 3 forms. Ex-Aid fights the Giri Giri Collabos while Brave fights Genm; the Collabos is too quick for Ex-Aid to attack, and Genm's flywheel distracts the Riders while he and the Bugsters escape. Seeing their signals have disappeared, Taiga leaves his makeshift office, heading somewhere.

As the doctors discuss the black Ex-Aid, Kiriya walks in and offers his help. He repeats that he had a friend die on Zero Day, but Emu says he'd already admitted that was a lie. Hiiro says he also lied about Graphite being Genm, deciding Kiriya to be untrustable. In the patient ward, Yoshio tells his daughter, Shiori, to again leave and quit fussing over him. Emu tells him not to stress himself, that the Bugster infection is potentially fatal, prompting a watching Kiriya to remember when he'd once told the same thing to his friend Jungo Aihara after sneaking documents from the Ministry of Health; Jungo had run off after hearing it. Yoshio fires his daughter from his factory where she works, making her run off, but Kiriya stops Emu from chasing her; he says that telling patients the truth about their condition can sometimes be the wrong action, that Yoshio is distancing his daughter from him for her own sake. Asuna then reports that the Bugster is making its move.

Emu and Kiriya intercept the Giri Giri Collabos chasing Shiori, but Hiiro arrives and transforms into Brave Level 2; he fights the Collabos but is attacked by Genm Level 2. Kiriya again offers to team up, promising no more lies; Emu decides to trust him, and the two transform to Ex-Aid and Lazer Level 2. The two rush the Giri Giri Collabos, Ex-Aid slicing its samurai sword before it can use it, then defeating it with a Bakusou Critical Finish using Lazer's Gashat in his Blade Mode Gashacon Breaker and clearing Giri Giri Chambara. Ex-Aid uses the new Gashat in Lazer's Driver, letting him take his Chambara Bike Gamer Level 3 form, giving Lazer a humanoid form. Lazer then reveals Genm's identity as Kuroto Dan, Genm Corp.'s CEO; Genm responds by assuming Sports Action Gamer Level 3, and Lazer summons the Gashacon Sparrow in Sickle Mode and attacks. Elsewhere, Snipe Level 2 is fighting with the Jet Collabos, but it escapes. Giri Giri Chambara's power and skill gives Lazer the upper hand against Genm, and he switches the Sparrow back to Arrow Mode and fires a Giri Giri Critical Finish, battering Genm; however, Parad arrives and secretly blocks part of the attack. Lazer expects to show Ex-Aid and Brave that Kuroto is indeed Genm, but as the flames disperse, only Parad is standing there, with both Genm's Gamer Driver and Proto Mighty Action X Gashat, thanking the Riders for the battle; he turns and disappears.

Parad returns the Driver and Gashat to Kuroto, saying that changing a single piece of the puzzle can hide the truth. As they predict, neither Emu nor Hiiro trusts Kiriya any longer. Hiiro reveals that Kiriya did have a friend that died 5 years prior, but of an accident and not the Bugsters, claiming the Gashat was all Kiriya was after by helping them. As Emu questions what kind of person he really is, Kiriya remembers seeing his friend dead from his earlier dream, that him telling Jungo about the Bugster infection's possibly fatal nature had apparently caused him to kill himself before the virus could. However, Kiriya only laughs at how his present situation has turned against him; he casually agrees he was only after the Gashat, telling Emu not to be so trusting as he walks away.

Soon after, Snipe acquires level 3, using the Jet Combat gashat, while also interrupting one of Ex-Aid and Brave's operations, taking the Bugster hostage and challenging both of the Riders to a fight. Once the Riders arrive, he quickly defeats both of them with his long-range capabilities, taking both the DoReMiFa Beats Gashat and the Gekitotsu Robots gashats, and destroying the Bugster in the process. With the Gashats lost, Ex-Aid and Brave both retreated, leaving Snipe with his prizes, while he tells them that don't understand the true purpose of the gashats.

After this event, Emu would head back to CR, where everyone started to freak out over the lost Gashats, causing a bit of a panic, before one of the devices detected a Bugster being created. This led Emu to rush to the scene, where Keisuke Jin, one of the Legendary 7 Kamen Riders, was already in the midst of combat against the remaining forces of G.O.D. led by Starfish-Hitler, who had allowed himself to become infected by the Bugster. Emu, holding onto his belief that the disease should be cured, ran into battle, trying to stop X-Rider from being infected by the Bugster, and preventing the disease from spreading further. X-Rider moved him out of the way when he ran between Starfish-Hitler's attack, and X-Rider's own. To counter this, Emu transformed into Level 1, trying to separate the Bugster from Starfish-Hitler.

During the battle with X-Rider, Starfish-Hitler had his troops set bombs along the shore, planning to spread the Bugster virus through the water supply of Japan. Ex-Aid noticed this, and asked from Kamen Rider X to stop him from completing his plans, while he separated the Bugster. Once the Bugster was separated from Starfish-Hitler, Ex-Aid fought the Bugster, while X-Rider fought Starfish-Hitler using his Ridol stick to beat Starfish-Hitler. Once the Bugster, and Starfish-Hitler were injured enough, both Riders activated their finisher Rider Kicks, destroying the Bugster and the Akuninkaijin simultaneously, preventing the Bugster virus from spreading.

After the battle, Emu and Keisuke both de-henshined, bowing to each other, with Keisuke acknowledging Emu as a true Kamen Rider, with Emu shocked by the gesture. After acknowledging him as Rider, Keisuke rode off into the sunset, with Emu headed back to CR, smiling.

Later, after Emu and the others learned that the Deputy Director-General would be coming to inspect the facilities, they began to clean up the CR, before Emu explained that Kyotaro had been the doctor that had saved his life when he was younger. Soon after, Kyotaro was shown entering the building, before being infected with the Bugster virus by Graphite. With this revelation, Emu and the others go to retrieve Kyotaro, and bring him back to CR.

After setting up the system to detect the Bugster in Kyotaro's body, Emu and Kyotaro talk for the first time since Emu's operation, Emu tells him that he will save his life, wanting to return the favor, since Kyotaro had given him a second lease on life. After confirming that it was the Bugster virus that Graphite had infected him with, Emu recalls that the virus was the same as the virus within Graphite.

When Hiiro arrives to perform the operation, Emu explains that the Bugster hasn't broken out yet, and tries to stop Hiiro from transforming. Hiiro proclaimed that he would just take the Bugster out instead, since it hadn't broken out, with the two doctors arguing over the operation, before transforming, causing the Bugster to appear.

With the Bugster out of Kyotaro's body for the time being, Ex-Aid selected the stage so that the two of them could fight the Bugster. Immediately after being transported there, the Bugster seemed to disappear, before emerging from the water, roaring at the two of them, with Ex-Aid recognizing it as the dragon from Drago Knight Hunter Z, and explaining the game to Hiiro. Suddenly, Graphite himself appeared in the battle, with the two Riders wondering why he was going after Kyotaro. He explained his plan to them, telling them that he wanted to create more Bugsters, and to have an army of complete Bugsters, before transforming.

After transforming, the Riders and Graphite proceed to battle, before the dragon re-emerges from the water, grabbing Ex-Aid and flying away with him, leaving Brave to battle Graphite. Soon after, Ex-Aid is dropped into the water, before jumping up, hitting the dragon bugster a vouple times with his hammer, before being sent back. When he and Brave recoved, Graphite used his Blackest Dragon Slash against the two, almost depleting their health bars, before disappearing with the other Bugster.

Back at the CR, Emu looked over Kyotaro, worried, before explaining to Hiiro that the patient's safety is the first priority, asking him what would happen if something were to happen to Kyotaro. After arguing for several minutes over the situation, Dan Kuroto appeared, explaining that they wouldn't be able to beat Graphite if they didn't work together, revealing the Drago Knight Hunter Z gashat, and telling them that it was the key to defeating Graphite, and telling them about the Level 5 gashat. He explained that the gashat was actually unfinished, and that they required data from a Hunter Gamer, which was the dragon they fought previously. He asked them to beat the game, and help him complete the gashat.

Hiiro initially volunteered, with Dan about to hand him the gashat, before Emu stopped Hiiro, explaining that Kyotaro meant a lot to him, stating that he would be the one who saved him. Dan explained that the gashat was different from the others, as it was a more challenging game, and was designed for four-player co-op, saying that it would be dangerous to use alone, before Emu snatches the gashat, saying that he would clear the game. Emu would visit Kyotaro soon, asking if he was alright, before Kyotaro explained that Graphite would try to infect a large number of people at the same time to try and stress out Kyotaro, and speed up the dragon's growth.

Hearing this, Emu ran out of CR, heading for a crowded area, where people had started to collapse due to the Bugster virus. After locating Graphite, and the source of the infection area, Emu headed there, transforming into Ex-Aid again, planning on fighting against Graphite at level 2, selecting the stage again, sending the two to a grassy area. Before he can attack; however, the dragon returns, flying above him to which Ex-Aid jumped on the dragon's leg, leaving Brave to deal with Graphite again. After flying away from Brave and Graphite's battle, Snipe appeared, firing on the dragon, before demanding Ex-Aid give him the gashat.

Initially acting like he was going to give up the gashat, Ex-Aid ran past Snipe, taking several blasts from his Gashacon Magnum, and even taking a Gekitotsu Critical Finish head-on, causing the Drago Knight Hunter Z gashat to fly into Snipe's hands for a moment. Ex-Aid stands up, demanding he give back the gashat, before deflecting several consecutive blasts from Snipe's weapon, grabbing a power-up in the process, increasing his attack strength enough to deal damage to Snipe's level 3 form, and knocking the Drago Knight Hunter Z gashat from his hands.

Soon afterwards, Snipe was attacked by the dragon again, enduring an aerial battle, before Ex-Aid activated his critical finish, along with Brave's taking Brave's sword for the time being and destroying the dragon, collecting the necessary data from the dragon. After having completed the gashat, Ex-Aid uses the gashat to achieve his Full Dragon Level 5 form, taking on the dragon's power by himself, transporting himself, Graphite, and the other Riders to another location. After achieving this form, Ex-Aid suddenly starts to get electrocuted, the power too great for him, causing him to rampage and attack both Graphite, and the other Riders, spraying fire from his armor. In this state, he was able to take Grpahite's attacks head-on, before stabbing him in the chest. After this attack, he was forcefully de-transformed, and teleported back to the rooftop he found Graphite on, injured heavily.

After this battle, Asuna helps Emu to get back to Emu, where Asuna explains to Kyotaro that Emu's injuries came from using the Drago Knight Hunter Z gashat alone. Hearing this, Kyotaro begins to scold Emu, before explaining that doctors cannot perform surgeries alone, and must have a reliable team to work with for a successful operation. Hearing this, Emu decided to try and get the other Riders to help him with the operation by explaining to them about the gashat. Upon hearing this, the other Riders abandoned Emu on the rooftop and went their separate ways. Soon after, Emu called each of the other three Riders individually, explaining that he would give the selected doctor the gashat, intending to draw them all in one place.

Once Hiiro/Brave arrives at the designated meeting place, he demands that Emu hand over the gashat before Snipe and Lazer also appear, making similar demands. Emu explained that he had them come here so whoever beat him could have the gashat, before activating his Mighty Action X gashat, with the others transforming as well, before they assumed their respective level 3 forms. Seeing this, Ex-Aid proceeded to activate the Drago Knight Hunter Z gashat, and assumed his level 5 form to fight the others. In the process of the fight, he was able to regain his Gekitotsu Robots gashat from Lazer, who had taken it from Snipe previously. After being hit by the three Rider's combined level 3 Critical Strikes, the Hunter Gamer separated from Emu, before being split into four different "multi-player" gashats.

After acquiring the Level 5 Dragon Fang gashat, Ex-Aid selected the stage, taking both he, the other Riders, and Graphite to a nearby empty Quarry, where Graphite proceeded to use the Proto-Drago Knight Hunter Z gashat to assume his upgraded Bugster form. With him assuming his form, the Riders used their individual gashats to assume their level 5 forms, with Emu first assuming his Full Dragon form, before the extra armor broke away, leaving him in his Level 5 Dragon Fang form. During the battle, each of the Riders would try one-up the others by attacking Graphite, before forming some resemblance to team work. At the end of the battle, each of the Riders used their Level 5 Critical Finishers to destroy Graphite together. After the battle, the Riders were sent back to the initial location, with the multi-player gashats being reformed into the normal Drago Knight Hunter gashat. Back at the original meeting place, each Rider said that their attack was the one that finished off Graphite, before demanding the gashat again.

During their argument, Asuna stepped in as Poppi Pipopapo to call it a tie. With each of the Riders accepting this answer, they disappeared in their separate directions, leaving Asuna and Emu alone. Back at the CR, Emu and Kyotaro talk for a little while, with both thanking the other for their help., before Kyotaro explains that the Ministry of Health will handle the public on the outbreak of the Bugster virus caused by Graphite, before leaving Emu and the others, with Emu returning to his job.

Some time later, he discussed the end of his internship at the hospital, as well as greeting one of his patients, Shuhei, and Shuhei's mother. After hearing that Shuhei hated Christams, the two left, leaving behind a confused Emu. Suddenly Shuhei started to grunt in pain, and collapsed before his eyes flashed red and he took off running, revealing he had been infected by the Bugster virus. Emu chased after him for a little while, before Shuhei collapsed again, with the Salty Bugster exiting his body at level 3. Seeing Salty again, Emu immediately entered his level 3 form with the Gekitotsu Robots gashat, and battled the Bugster, overwhelming him easily with the form's greater strength.

During the battle, Genm appeared in his own Level 3 form, attacking Ex-Aid with a surprise attack from behind. Seeing Genm, Ex-Aid decided to level up, using the Drago Knight Hunter Z gashat to assume Level 5 with the Full Dragon form. In this form, Emu is able to control himself somewhat, but is still greatly damaged by using it, still overpowering Genm with ease, before he goes out of control, flying around, before slamming into a nearby wall, being covered in rubble while Genm and Salty escape. After escaping the rubble, Emu goes back to visit Shuhei in the CR, apologizing to Shuhei for him being infected before Christmas and promising to cure him. Shuhei ignores his sentiment, and rolls over, saying that he doesn't want to go home for Christmas. Hearing this, Emu asked his mother what he liked, to which she responded with cake.

After hearing her say this, he went off to go get Shuhei a cake, before getting a call from Genm's CEO Kuroto Dan, heading there first. Arriving there, he is met by Dan, Taiga, and Kiriya, all of whom were called there as well to discuss the last remaining gashat, Shakiriki Sports. Dan explained that the Genm/the Black Ex-Aid had allied himself with the Bugsters, and was trying to take the life of the patients for an unknown purpose. Dan asked the riders to defeat the black Ex-Aid and retrieve the last gashat. Standing up for the Director, Emu said that he didn't have anything to do with the infection, before Kiriya questioned his loyalties. Emu explained that he didn't need a reason to trust someone, and said that he trusted Kyotaro over Kiriya, before leaving.

Some time later, Emu arrived at the store, struggling to get to the counter of the store for the cake, before being knocked down. Getting Shuhei's cake, Emu headed back to the CR, before Shuhei told him that he hated cake, causing Emu to compare himself unfavorably to Kyotaro in a negative light, saying that he wasn't like him after all while he discussed it with Poppi Pipopapo. Suddenly he got a call from Kuroto Dan, saying that he needed to move his current patient, directing him to a skate park due to the Ministry of Health possibly being the source of the Bugster virus. Once there, Genm once again appears in his Level 3 form, walking toward Emu, Shuhei, and Poppi. Giving Shuhei to Poppi, Emu transformed into his Full Dragon Level 5 form again, fighting Genm. Hearing Genm say that he was following Kyotaro's orders, Emu briefly rampages as Ex-Aid's eyes flash purple.

With Genm charging up his finisher, Emu continues to struggle with controlling his body, before Kiriya pushes him out of the way, avoiding the Critical Finish. Struggling to stand up, Emu is told by Kiriya to trust in his beliefs, which caused Ex-Aid's eyes to flash red, regaining control over Full Dragon. After gaining control, Ex-Aid able to overpower Genm with ease, sending him flying back. Ex-Aid is surprised by the sudden appearance of Taiga and Hiiro, who both agree to work with Emu to bring down Genm. Hearing this, Emu says that they will fight as a four-person party, before reactivating the Drago Knight Hunter Gashat, putting the other Riders in Level 5, and causing Emu to assume Dragon Fang.

With their superior strength, and advantage of having four against one, the Riders are able to overpower Genm easily, draining his health bar to almost zero, as well as knocking the Shakariki Sports gashat away from Genm. This causes him to revert to level 2, as well as leaving him with only two slots of health left. The Riders warn him about his closeness to death, before telling him to flee, or that he would end up dying. Genm decided to activate his Critical Finish, and aims it at the nearby Shuhei. Seeing this, Ex-Aid runs over, before blocking the attack with his back armor, before swatting Genm away with his tail, depleting the rest of Genm's health, which causes his healthbar to turn red. With Genm still standing, Ex-Aid catches the now cleared Shakariki Sports gashat, while watching Genm stab himself in the chest with a white gashat in the Bugvisor.

Watching Genm closely, Ex-Aid and the others watch as Genm pulls out his Proto-Mighty Action X gashat, revealing himself to be Kuroto Dan, and re-legitamize Kiriya's claim of him being the black Ex-Aid. now known by all to be Kamen Rider Genm. With Emu and the others in shock, Dan reveals that a number of civilians had been infected and could break out at any time, before telling them to use the ten gashats to cure the patients, if they could. He also told them that he was doing all of this to create the 'ultimate game'. Before Emu and the others can stop him, Dan fires the Bugvisor at the others, before disappearing, leaving the confused doctors behind. Soon after, Emu and Hiiro returned to the CR, shaken by this revelation.

As Kiriya started to leave, Emu asked him to wait, explaining that he knew the truth about Kamen Rider Genm now, thanks to Kiriya. Asking him about the incident with his friend, Kiriya explained that his friend died because he told him that he was infected with the Bugster virus. Hearing this, as well as Kiriya's motives and goal, Emu told Kiriya that he trusts him full now, and would help him. With that, Kiriya smiled, and told Emu to return Shuhei's smile. Promising to cure Shuhei, and return his smile, Emu left Kiriya and returned to work. Once there, he talked to Shuhei's mother about his hatred toward cakes. She explains that she and her husband run a bakery, and that they are very busy during the Christmas season, before telling Emu that Shuhei broke his leg climbing a nearby tree.

Hearing this, Emu investigates the tree. He notices something on the tree and begins to climb it, before grabbing the object. Returning to the CR with the object in-hand, EWmu goes to visit Shuhei, asking him if he feels better. He tells Shuehi about how he used to sit at home, alone on most nights, playing video games, as well as designing his own ideas for video games. He proceeds to compare this to Shuhei climbing trees, before explaining that he climbed the tree in the park. Hearing this, Shuhei's eyes flashed red, indicating that the Bugster was on the move. Arriving at the Salty Bugster's location with Shuhei and Poppy in tow, Emu transforms, leaving Shuhei in Poppy's hands. Starting out in his Level 1 form, Ex-Aid quickly decided to use the Shakariki Sports gashat to assume his second level 3 form. Using his agility to jump behind Salty, Ex-Aid quickly freed Shuhei's mother from Salty's grasp.

Fighting the Bugster Virus mooks spawned by Salty, Ex-Aid uses his level 3 to defeat several of them before Brave appears in his own Level 3 form, fighting the Bugster as well. After defeating several of the Bugster spawn, Ex-Aid notices an energy item bearing a resemblance to Santa Claus. Getting it, he is reverted to Level 1 in a special Christmas version, along with Christmas versions of both the Sports Gamer, and Brave's level 3 form, as well as giving Poppy a special Christmas outfit. After Shuhei and his mother make up, Ex-Aid explains that he brought Shuhei outside to make him smile again. Pulling out the Gashacon Breaker from his Christmas sack, Ex-Aid returns to fighting Salty in his level 1 form. Soon after, he is joined by Brave, who fights Salty in his level 3 form, with the two arguing briefly (to somewhat comedic effect) over whether they were actually working together or not. Shortly after this, Brave and Ex-Aid finish Salty off, and cure Shuhei of his Bugster infection.

Reverting to their normal forms, Emu and Hiiro stop Poppi from harassing Shuhei with her singing, before she reveals that she's actually a Bugster from the DoReMiFa Beats game. The two quickly explain that actually already knew that, which leads to her being confused as to how they already knew. Checking on his pateitn, Emu went over to talk to Shuhei, before wishing them both a Merry Christmas. Heading back to CR, the group celebrates their Christmas together, and eat the cake that Shuhei and his parents gave them. They discuss the most recent Bugster, before Hiiro declares that the Bugster virus is mutating, leaving Emu and his father confused. Figuring out what he is saying, Emu figures out that the old Bugsters they defeated are coming back more evolved, Emu and Hiiro receive a message from Kiriya to meet him. Quickly running there, Emu and the others try to make it there before Dan/Genm does. Arriving as the stage generates, Emu and Hiiro transform together, fighting off several spawned stage Bugsters.

The two continue to fight the Bugsters in their level 2 forms, before continuing to Kiriya's location as it starts to rain. Finding the warehouse where Kiriya told them to meet him, along with Snipe/Taiga being present, Emu and the others rush to Kiriya's aid, only for him to flicker briefly, showing that he has gotten a Game Over. He confirms Genm's return, before entrusting his Gamer Driver and Bakusou Bike gashat to Emu, telling him to keep smiling, and to change his own fate with his hands. Saying these parting words, he falls back, disappearing into data, and leaving the others in the rain with Emu mourning his death.

After this, and later the public announcement about the Bugster virus, Emu finishes his internship to be a pediatrician, and begins his tutelage under Hiiro to become a surgeon. During one of the surgeries, Emu took to long to tie a piece of string around a tube, due to having a flashback of Kiriya's death, and was reprimanded by Hiiro. Following this, Emu followed Hiiro away from the patient, discussing Kiriya's death. Hiiro proceeds to tell Emu that they have a responsibility, and cannot dwell on personal feelings. Following this discussion, Emu and Hiiro headed for CR, having received a call from Asuna.

Arriving, the two are told the patient's name, as well as his job, revealing him to be a famous surgeon named Kazuki Shirakawa. Once they discuss the disease with the patient, the disease breaks out, revealing the Level 5 Aranbura Bugster. Upon seeing it, Emu and Hiiro transformed into Ex-Aid and Brave respectively, with Hiiro changing the stage so that they wouldn't damage the CR. Transforming into their level 2 forms, the two attack the Bugster, but are unable to cope with his spells freezing them in place. Following a lightning attack, the two are surprised by the arrival of Kamen Rider Genm in Level 10.

Hearing his proclamation about taking back the gashats, as well as his use of Kiriya's Gashacon Sparrow, Emu flew into a rage and attacks Genm in his Level 5 Full Dragon form. Catching Genm in a fiery explosion, Ex-Aid is surprised to see him walk out of it so easily, before being shot by Genm's Gashacon Sparrow. Genm and Ex-Aid trade blows for a while, while Brave fights the bugster at Level 2, being overwhelmed. Seeing Ex-Aid driven only by rage, Brave tells him to focus on the operation, before grabbing Ex-Aid and knocking him out of the way of Genm's Critical Dead. Quickly grabbing both his, and Ex-Aid's gashats, Hiiro caused both of them to de-henshin, which in turn allowed them to escape with the stage dissolving.

Once they arrive back at the CR, Emu stands silently while Hiiro and his father reprimand him for acting on personal feelings. During this, Hiiro says that he will be taking all of Emu's gashats away, leading Emu to apologize, before they leave, leaving Emu alone. Walking back to the patient with Poppi, they discuss the patient's care, before he tells them that it won't matter, as he is currently dying from cancer. Hearing this, Emu goes outside with his coat, and equipment, trying to figure out what he should do, before he is approached by a familiar face. Parad tells him to quit being a doctor, before Emu recognizes him as the fake Genm. Discussing Emu's proffesion, Parad compares it to being the hardest game there is, since humans can only die once. Telling Parad that thanks to his 'game', Kiriya is dead, before Parad tells him to calm down, as Genm killed Kiriya, not him.

Getting a call from Poppi, Emu explains that he doesn't want to see anyone die. Parad questions this, before handing Emu a blank gashat, telling him to change his fate, before disappearing. Hurrying to the scene, Emu is able to arrive before Genm has the chance to finish off Brave and Snipe, holding the blank gashat in his hands. Holding it up, before slotting the gashat, Emu suddenly collapsed, as a large black cloud emerged from the gashat, with the gashat having been filled with the Bugster virus. Declaring his intent, Emu absorbed the black cloud, with his eyes temporarily becoming monochromatic, with a blue and orange flash to appear in front of him. The flash quickly disappears, flowing into the blank gashat, before the gashat itself flies out of the gamer driver. Emu quickly catches it in the air, before slotting it back in the Gamer Driver, flipping the cover of the belt, before transforming.

With his new Double Action Gamer Level X form, Ex-Aid is able to easily overwhelm his opponent, quickly putting Genm on the defensive. Knocking Genm to the ground, Ex-Aid pulls one more trick out of his sleeve, closing and flipping the cover on the Gamer Driver to level up, leaving him into two Level XX bodies. Upon seeing each other, M (the orange Ex-Aid) and Emu (the light blue Ex-Aid) began to argue, before deciding to settle it later, with M summoning the Gashacon Key Slasher, heading towards Genm, before being stopped by Emu. Emu told him that they should save the patient's life, instead of focusing on revenge, as the patient comes first. The two briefly bicker again, before the Bugster and Genm manage to slip away.

M gets mad at the fact that they were able to escape, calling the Bugster and Genm cowards, before Emu closed the cover of the Driver, removing the gashat. With the gashat removed, Emu and M fuse back into their human form. Exhausted, Emu looks at the gashat before getting a terrible headache and passing out. After being taken back to the CR, Emu went to visit the patient, explaining that the Bugster managed to escape. Discussing his pancreatic cancer, Emu declares his intent to not give up on Kazuki, not matter the circumstances. Hearing this, Kazuki tries to dissuade Emu, but Emu refuses to give up. Leaving the room, he meets Hiiro and Asuna on the roof of the hospital, asking Hiiro to perform surgery on Kazuki's cancer.

Emu explained to Hiiro why the Bugster had been attacking him, in an attempt to prevent Kazuki's cancer from being removed. He tells Asuna and Hiiro that Hiiro needs to operate on Kazuki's cancer so they can save his life, as well as explaining Kazuki's motives for wanting Hiiro to operate him. Watching Hiiro walk away, M takes over, and insults Hiiro, saying that he is too afraid of tarnishing his reputation for being a genius surgeon. Stating that he has confidence in his own abilities, Emu asks Hiiro for his gashats so he can perform the Bugster removal himself. Getting his gashats back from Hiiro, Emu heads down to the lobby of the hospital, and waits for the Bugster to arrive. Locating him, Emu tells Asuna to evacuate the civilians before heading to face the Bugster by himself. Telling the Bugster about the surgery, M takes over and transforms into Ex-Aid, telling the Bugster that he has his own operation to do.

Transforming into his Level 1 form, Ex-Aid quickly levels up to Level 2 to fight the Bugster. Though he is at a disadvantage strength-wise, Ex-Aid is able to use his agility to fight the Bugster on even terms for the most part, before using the Bakusou Bike gashat to summon the Bike Gamer in honor of Lazer's memory. Ramming into the Bugster to prevent him from using his magic, Ex-Aid carried him away from the hospital on the front of the motorcycle, before arriving at what appears to be a shipping yard. Seeing Kuroto Dan there, Ex-Aid slams on the brakes, sending the Bugster flying off, before charging at Genm with his Gashacon Breaker. Blocking the shots fired from the Gashacon Sparrow with the Gashacon Breaker, Ex-Aid is able to get close to the Bugster, before his attack is blocked by Genm, who slashes him back.

Being double-teamed by Genm and the Bugster, Ex-Aid is overwhelmed by the two, but refuses to give up, being blasted back and knocked out of his transformation. Hearing Genm's threat to delete the Mighty Brothers XX gashat, Emu stands up, before saying that this is not a game, but an operation. Pulling out the gashat, Emu quickly transforms into Level X, before closing and opening the cover of the gamer driver again, turning into his Level XX forms. The two Ex-Aids face each other, before declaring their intention to clear the battle with Co-Op, charging forward at the Bugster, with M fighting Genm so that Emu can fight the Bugster undisturbed. During the battle, the two Ex-Aids swap the Gashacon Key Slasher back and forth, damaging both Genm and the Bugster, while also switching opponents. The two proceed to kick Genm away from the battlefield, before focusing on the Bugster, overwhelming it with their co-op attacks, the two Ex-Aids open and close the cover on their drivers, activating the finisher.

With the finisher activated. the two quickly hit the Bugster with a fast flurry of kicks, before the Ex-Aids re-merge into Level X, punching the Bugster upward, before returning to their dual forms, hitting the Bugster with a powerful Double Rider Kick. The Bugster explodes, but is drained into the Gashacn Bugvisor by Genm, who tells the two that no matter how many patients they save, they won't affect the ending, before he walks away. Watching him disappear, the two close the cover of their drivers, before removing the double gashat, reverting back to Emu, who gets another powerful headache, before passing out. During this time, Emu's blood is taken by Taiga, who would go to discover that Emu is infected later. Waking up, Emu looks around, before rushing back to the hospital for the results of the surgery, having cleared the game when he destroyed the Bugster. Arriving back at the hospital just in time to see Hiiro walk out of the operation room, Emu asks Hiiro how it went. Hearing the response that "there is nothing I cannot cut", he is re-assured that the operation was successful.

Glad to know this, Emu goes to visit Kazuki, giving him a thumbs up, before grabbing his fist in a sign of happiness.

Personality
Emu Hojo is a very clumsy and yet a serious doctor to take on his job. However, his thirst for playing video games has a problem of Emu being absentminded at times. An example of this is he sometimes fails to remember his work schedule properly and it makes the nurses scold him. He also has a habitual quirk of tumbling down in various comical ways.

As "M", his alias that he uses when playing video games, he shows a completely different side of himself. He displays a focused, calmer, and more confident demeanor. His Grammatical persona also changes from 僕 ( Boku) into 俺 ( Ore), proving to be extremely skillful at video games, to the point where he has come to be known as the "genius gamer" who never leaves any game unfinished. This carries over to his battles as Ex-Aid, as his knowledge of video games has proven to be a definite advantage. Originally, when shifting to his Genius Gamer M personality, a wind blows throw his hair and he makes a cocky smile. But during episode 10, Emu's eyes instead flash pink before turning a less intense, glowing red, after which, his eyes turn back to normal. Though he still makes the same cocky smile as before, showing that he can actually shift into his gamer persona at will. Emu has a very idealistic attitude towards being a doctor: he invests himself in the well-being of his patient, hoping to help them both physically and personally. He will always try to help a patient in need, even if they are a criminal, an enemy, or refuses to get help. For him, a life is a life and it's worth saving, fitting the morality of a true doctor and their devotion to the Hippocratic Oath. This mindset helped him connect stress as a catalyst for Bugster infection, but also hinders him if the enemy is smart enough to threaten the patient's life. His firm idealism has led to clashes with his fellow CR Rider, Hiiro. Hiiro views Emu as naive and inexperienced, while Emu openly opposes Hiiro's detached and callous approach, going as far to say Hiiro is not a real doctor. However, Emu is not without a dark side. When pushed too far, Emu can lose control of his temper and when that happens his Gamer side becomes as vicious and selfish as his rivals. This was shown when Kyotaro is infected by Graphite. Emu become so frustrated into believing that he's the only one who can save Kyotaro, to the point that he'll do anything to capture the Hunter Gamer, even using a stolen Gashacon Sword. While this shows, that Emu takes pride in his beliefs as a doctor, at the same time it demonstrates that as a Gamer he shares Genm's and even Taiga's ideals to some extent. However, after enlightenment from his idol, Kyotaro Hinata, Emu decide to trust the fellows doctor riders, although only Kiriya believed in Emu

Regular Forms
Action Gamer Level 1 (アクションゲーマーレベル1 Akushion Gēmā Reberu Wan) is Ex-Aid's default super deformed form, activated by inserting the Mighty Action X Gashat into the Gamer Driver. This form is used to battle a Bugster-infected human and is the only way to extract the monster from the host. In this form, Ex-Aid can generate platforms to jump onto, allowing him to traverse difficult to reach areas. Action Gamer Level 2 (アクションゲーマーレベル2 Akushion Gēmā Reberu Tsū) is Ex-Aid's primary fighter form, activated by inserting the Mighty Action X Gashat and pulling the lever on the Gamer Driver. This form is based on fighting games. This form is physically weaker than Ex-Aid's Level 1 form, evidenced by having exactly less than two tons of Punching Power and 1.3 tons less Kicking Power, however it is considerably more agile. Ex-Aid's fighting style revolves around using his enhanced jumping abilities to bounce around enemy and avoid attacks. Robot Action Gamer Level 3 (ロボットアクションゲーマーレベル3 Robotto Akushon Gēma Reberu Surī) is Ex-Aid's upgraded form, accessed by inserting the Gekitotsu Robots Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, the Robot Gamer fuses with Ex-Aid, becoming part of his armor. His chest is covered with the Raid Actuator (レイドアクチュエーター Reidoakuchuētā) and Guard Actuator (ガードアクチュエーター Gādoakuchuētā), which rewrite the Gain Riser program to dramatically increase his attack and defense powers, while his shoulders are protected by a pair of Power Mec Shoulders (パワーメックショルダー Pawāmekkushorudā) having built-in power assist devices to enhance his combat ability. Sports Action Gamer Level 3 (スポーツアクションゲーマーレベル3 Supōtsu Akushon Gēma Reberu Surī) is Ex-Aid's upgraded form, accessed by inserting the Shakariki Sports Gashat into the Gamer Driver along with the Mighty Action X Gashat and pulling the lever. In this form, the Sports Gamer bike combines with Ex-Aid, becoming part of his armor. Both Ex-Aid and Genm shares the same stats in this form. Burger Action Gamer Level 4 (バーガーアクションゲーマーレベル4 Bāgā Akushon Gēma Reberu Fō) is Ex-aid's upgraded form, accessed by inserting the Ju Ju Burger Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, the Burger Gamer fuses with Ex-Aid, becoming part of his armor.
 * -|Action Gamer Level 1= Action Gamer Level 1
 * Rider Height: 181cm
 * Rider Weight: 130kg
 * Ability Perimeters
 * Punching Power: 7.7 tons
 * Kicking Power: 11.5 tons
 * Max Jump Height: 30.5m
 * Maximum Running Speed: 100m/7.6s
 * -|Action Gamer Level 2= Action Gamer Level 2
 * Rider Height: 205cm
 * Rider Weight: 97kgKREA-Exaidl2.png
 * Ability Perimeters
 * Punching Power: 5.7 tons
 * Kicking Power: 10.2 tons
 * Max Jump Height: 43.1m
 * Maximum Running Speed: 100m/3.2s
 * -|Robot Action Gamer Level 3= Robot Action Gamer Level 3
 * Rider Height: 205cm
 * Rider Weight: 118.2kg
 * Ability Perimeters
 * Punching Power: 57 tonsKREA-Exaidl3.png
 * Kicking Power: 14.3 tons
 * Maximum Jump Height: 39.3m
 * Maximum running speed: 100m/4s
 * -|Sports Action Gamer Level 3= Sports Action Gamer Level 3
 * Rider Height: 205cm
 * Rider Weight: 104.4kg
 * Ability PerimetersKREA-Exaidl3b.png
 * Punching Power: 10.3 tons
 * Kicking Power: 18.4 tons
 * Maximum Jump Height: 45.3m
 * Maximum running speed: 100m/3s
 * -|Burger Action Gamer Level 4= Burger Action Gamer Level 4
 * Rider Height: 216.8 cm.
 * Rider Weight: 103.7 kg.
 * Ability Perimeters:
 * Punching power: 17.7 t.
 * Kicking power: 20.8 t.
 * Maximum jump height: 45.5 m.
 * Maximum running speed: 100 m. per 2.9 sec.

Upgrade Forms
Hunter Action Gamer Level 5 (Full Dragon) (ハンターアクションゲーマーレベル5 (フルドラゴン) Hantā Akushon Gēmā Reberu Faibu (Furu Doragon)) is Ex-Aid's upgrade form accessed by inserting the Drago Knight Hunter Z Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, Ex-aid is armed by all Dragon parts from Hunter Gamer.
 * -|Hunter Action Gamer Level 5 (Full Dragon)= Hunter Action Gamer Level 5 (Full Dragon)
 * Rider Height: 206.5cm KREA-Exaidl5b.png
 * Rider Weight: 157kg
 * Ability Perimeters
 * Punching Power: 18.2 tons
 * Kicking Power: 24.4 tons
 * Maximum Jump Height: 48.7m
 * Maximum running speed: 100m/2.8s

This form is strong enough to take a direct hit from Dark Graphite's Black Dragon Sword unharmed. However, during it's initial usage, this form rendered Ex-Aid into a rampaging mindless beast and going out of control, attacking friend and foe alike, before quickly de-transforms itself and leaves Emu exhausted. Hunter Action Gamer Level 5 (Dragon Fang) (ハンターアクションゲーマーレベル5 (ドラゴンファング) Hantā Akushon Gēmā Reberu Faibu (Doragon Fangu)) is Ex-Aid's upgrade form accessed by inserting the Drago Knight Hunter Z Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, Ex-aid is armed by the Dragon head and Torso from Hunter Gamer.
 * -|Hunter Action Gamer Level 5 (Dragon Fang)= Hunter Action Gamer Level 5 (Dragon Fang)
 * Rider Height: 206.5 cm.
 * Rider Weight: 117.0 kg.
 * Ability Perimeters:
 * Punching power: 19.0 t
 * Kicking power: 25.0 t.
 * Maximum jump height: 49.0 m. KREA-Exaidl5a.png
 * Maximum running speed: 100 m. per 2.7 sec.

This form is acquired when all four doctor riders (Ex-Aid, Brave, Snipe and Lazer) Use the copies of the original Drago Knight Hunter Gashat. Ex-Aid stats is notably higher when using this form rather than full dragon form, though this can be attributed to the power of dragon fang mode not being as uncontrollable and taxing as full dragon mode. Furthermore, since Ex-Aid just need to use the Fang part of Hunter Gamer, Ex-Aid can gain better control of himself. This form's finisher is the Drago Knight Critical Strike (ドラゴナイトクリティカルストライク Dorago Naito Kuritikaru Sutoraiku): Ex-Aid along with other Doctor riders deliver consecutive energy attacks to enemy (In Ex-aid case, he shoot powerful stream of fire), effectively destroying the said enemy.

Super Forms
Double Action Gamer Level X (ダブルアクションゲーマーレベルX Daburu Akushion Gēmā Reberu Ten) is Ex-Aid's default upgraded deformed form, activated by inserting the Mighty Brothers XX Gashat into the Gamer Driver and pulling the lever. It's a redesign of Level 1 with bluish-green and orange hair, and a different chest piece.
 * -|Double Action Gamer Level X= Double Action Gamer Level X
 * Rider Height: 183cm
 * Rider Weight: 139kg
 * Ability Perimeters
 * Punching Power: 22.2 tonsKREA-Exaidlx.png
 * Kicking Power: 28.7 tons
 * Max Jump Height: 54m
 * Maximum Running Speed: 100m/2.2s

Compared to his other forms, Ex-Aid has far superior stats in this form, as shown when he is able to damage Genm Level X at ease, something that either Kamen Riders in Level 3 or even Level 5 could do. He also could wield the Gashacon Key Slasher in this form, although this is yet to be shown. Double Action Gamer Level XX (ダブルアクションゲーマーレベルXX Daburu Akushion Gēmā Reberu Tsuentī) is Ex-Aid's upgraded fighter form, accessed from Double Action Gamer Level X by closing and reopening the lever. In this form, Ex-Aid splits into two separate bodies and wields the Gashacon Key Slasher.
 * -|Double Action Gamer Level XX= Double Action Gamer Level XX
 * Height: 206.0 cm.
 * Weight: 98.8 kg.
 * Ability Perimeters:
 * Punching power: 32.3 t.KREA-Exaidlxx.png
 * Kicking power: 40.6 t.
 * Maximum jump height: 66.0 m.
 * Maximum running speed: 100 m. per 2.0 sec.

The bluish-green Ex-Aid XX L acts like Emu as he is relatively calm and prioritizes the patient's safety first. His other half, the orange Ex-Aid XX R acts like the Genius Gamer M; he is cocky and prioritizes defeating the enemy to ensure victory. As opposed to becoming slightly weaker like going from Level 1 to Level 2, leveling up into this form offers a massive power boost, as all of Ex-Aid's stats are increased. This form appears to have a downside, as when Emu deactivates his transformation, he gets massive headaches that are unbearable and faints to the ground, being unconscious for a short time.

Legend Rider Forms
Ghost Gamer Level 1 (アクションゲーマーレベル1 Akushion Gēmā Reberu Wan) is Ex-Aid's crossover Kamen Rider Ghost-based super deformed form, activated by inserting the Kaigan Ghost Gashat into the Gamer Driver. This form is used to battle a Bugster-infected human and is the only way to extract the monster from the host.
 * -|Ghost Gamer Level 1= Ghost Gamer Level 1
 * Height: 181.0 cm.
 * Weight: 137.0 kg.
 * Ability Perimeters:Ghost_Gamer_LV1.png
 * Punching power: 10 t.
 * Kicking power: 11.5 t.
 * Maximum jump height: 40 m.
 * Maximum running speed: 100 m. per 6 sec.

Like the original Level 1 form, the Ghost Gamer is physically stronger than the Level 2, but lacks mobility to a greater extent, putting it at a disadvantage with versatile enemies. Ghost Gamer Level 2 (ゴーストゲーマーレベル2 Gōsuto Gēmā Reberu Tsū) is Ex-Aid's crossover form themed after Kamen Rider Ghost. Activated by inserting the Kaigan Ghost Gashat into the Gamer Driver, and pulling the lever. In this form, Ex-aid gain abilities similar to Kamen Rider Ghost. Ex-Aid is armed with Ghost's Gan Gun Saber in this form.
 * -|Ghost Gamer Level 2= Ghost Gamer Level 2
 * Height: 205.0 cm.
 * Weight: 90.0 kg.
 * Ability Perimeters:Ghost_Gamer_Level_2.png
 * Punching power: 7.9 t.
 * Kicking power: 9.5 t.
 * Maximum jump height: 60 m.
 * Maximum running speed: 100 m. per 5 sec.

This form finisher is the Kaigan Critical Strike (カイガンクリティカルストライク Kaigan Kuritikaru Sutoraiku): Ex-Aid, along with Ghost Ex-Aid Damashii, performs a flying kick into the enemy while uses spiritual energy which makes their body and mask glow (in Ex-Aid's case), he is envelops in a orange flame.

Extra Forms

 * -|Proto Robot Action Gamer Level 3= Proto Robot Action Gamer Level 3
 * Rider Height: 205cm
 * Rider Weight: 118.2kg
 * Ability PerimetersKREX-Exaidl3.png
 * Punching Power: 65 tons
 * Kicking Power: 14.3 tons
 * Maximum Jump Height: 39.3m
 * Maximum running speed: 100m/4s

Proto Robot Action Gamer Level 3 (プロトロボットアクションゲーマーレベル3 Puroto Robotto Akushon Gēma Reberu Surī) is Ex-aid's upgraded form, accessed by inserting the Proto Gekitotsu Robots Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, a prototype of the Robot Gamer fuses with Ex-Aid, becoming part of his armor. His chest is covered with the Raid Actuator (レイドアクチュエーター Reido Akuchuētā) and Guard Actuator (ガードアクチュエーター Gādo Akuchuētā), which rewrite the Gain Riser program to dramatically increase his attack and defense powers, while his shoulders are protected by a pair of Power Mec Shoulders (パワーメックショルダー Pawā Mekku Shorudā) having built-in power assist devices to enhance his combat ability.

Ex-Aid's main weapon in this form is his left robot arm Gekitotsu Smasher (ゲキトツスマッシャー Gekitotsu Sumasshā), which amplifies Ex-Aid's punching power by 10 times. It is also equipped with a small rocket booster for ranged attack.

This form's finisher is the Gekitotsu Critical Strike (ゲキトツクリティカルストライク Gekitotsu Kuritikaru Sutoraiku, Clash Critical Strike): Ex-Aid fires the Gekitotsu Smasher at the enemy and then punches the enemy while putting the Gekitotsu Smasher back on, dealing massive damage with the after-shock created.

Hunter Action Gamer Level 5 (ハンターアクションゲーマーレベル5 (フルドラゴン) Hantā Akushon Gēmā Reberu Faibu) is Ex-Aid's upgrade form accessed by inserting the Drago Knight Hunter Z Gashat along with the Mighty Action X Gashat into the Gamer Driver and pulling the lever. In this form, Ex-aid is armed by all Dragon parts from the Hunter Gamer. His weapons include:
 * -|Proto Hunter Action Gamer Level 5 = Proto Hunter Action Gamer Level 5 
 * Height: 206.5 cm.
 * Weight: 157.0 kg.
 * Ability Perimeters:
 * Punching power: 20.2 t.
 * Kicking power: 24.4 t.
 * Maximum jump height: 48.7 m.
 * Maximum running speed: 100 m. per 2.8 sec.KREX-Exaidl5b.png

Other than that, his armor is reinforced with:
 * Dragon Fang: Transformed from the Dragonknight-Fang, it's a dragon-head headgear covering his helmet. It can not only can crush his enemies with powerful bites, but also jet a high-temperature flame and burn them. Furthermore, it is equipped with the Search Drago Eye to collect and display surrounding, and help Ex-Aid cover his blind spot and control the Wip Drago Tail. In Episode 11, He can the Dragon Fang's wings to fly, but ends up crashing into a building.
 * Dragon Blade: Transformed from the Dragonknight-Blade, it's an electromagnetic blade equipped on his right arm, allowing him to easily slash and neutralize Bugsters.
 * Dragon Gun: Transformed from the Dragonknight-Gun, it's a railgun equipped on his left arm that shoots compressed metal at ultra-high speed to destroy multiple Bugster viruses at once.

This form's finisher is the Drago Knight Critical Strike (ドラゴナイトクリティカルストライク Dorago Naito Kuritikaru Sutoraiku):
 * Chest Drago Mail: It covers and protects Ex-Aid's chest by absorbing physical damages with its thickness. It has the ability to self-repair.
 * Shoulder Drago Armor: It protects Ex-Aid shoulders and enhances the power of the Dragon Blade and the Dragon Gun with an electromagnetic strengthening device.
 * Mec Drago Guard: It rewrites the Gain Riser program to dramatically increase his attack and defense powers, in addition to rebuilding other damaged parts and increasing their durability.
 * Leg Drago Armor: Transformed from the Dragonknight-Claw, it protects Ex-Aid's legs and also incorporates an air injection device that reduces the sensory weight and increases the exercise speed.
 * Wip Drago Tail: A dragon tail equipped on his back, which helps him defend himself when attacked from behind.

This form can easily take a direct hit from Dark Graphite's Black Dragon Sword, a powerful attack that is strong enough to defeat 2 Level 3 and 1 Level 2 Kamen Riders at once, unharmed. However, during its initial usage, this form's overwhelming power rendered Ex-Aid into a rampaging mindless beast and going out of control, not unlike OOO Putotyra Combo, attacking friend and foe alike, before quickly de-transforming itself and leaings Emu exhausted. Later, Ex-Aid could control this form with sheer willpower for a very short time, but still taxing his stamina.

Equipment/Abilties

 * Gamer Driver: The Transformation Belt Gamer Driver (変身ベルトゲーマドライバー Henshin Beruto Gēmā Doraibā) is a transformation belt for the Ex-Aid Riders. Before someone can properly use the Gamer Driver, they must become a candidate by undergoing a compatibility surgery, which introduces a small sample of the Bugster Virus to their body to induce antibody production. This presumably allows them to handle the side effects of usage, which would otherwise be dangerous. When a Rider gets a game over, the body of the Gamer Driver user will disintegrate into data.
 * Skilled Gamer: Emu is a masterful gamer, particularly in terms of platform gaming. He has extensive knowledge of games in other genres, including Bang Bang Shooting and Bakusou Bike and can adapt easily when playing a new game. These skills are further enhanced when he enters a state of emotional rage or frustration, as shown when he effectively, in separate occasions, outmaneuvered both Genm and Snipe who are both at their Level 3 while Emu is only on Level 2.
 * High Interpersonal Skill: Despite his clumsiness, Emu's kindness has allowed him to connect with all of his patients.
 * Natural Game Disease Immunity: Unlike all other Riders who had undergone a compatibility surgery to be immune from the Game Disease and able to transform into a Kamen Rider, Emu is capable of utilizing the Rider System even without the intervention of said surgery and seems to be unaffected by Bugster infection agents. Kiriya discovered the real reason behind Emu's condition but was silenced by Genm before he can reveal the truth. This unusual immunity is also what enabled the creation of the Mighty Brothers XX Gashat, as the blank Double Gashat injects a massive amount of the Bugster Virus, which will normally kill a Rider when used in the Gamer Driver, even when the Rider has already been immune to the Game Disease. He was the first person to be infected with the Bugster Virus as a kid, and was experimented on by Dr. Pac-Man to develop the later, more recent version of the virus, which is why he has natural antibodies for the virus and such can use the Gamer Driver without the need for an immunization operation.
 * Separation: Due to the Bugster Virus in Emu's DNA, he is able to separate into two different Riders.
 * Gashacon Breaker - Standard sidearm weapon, can be a hammer or a sword.
 * Gashacon Sword - Brave's primary blade weapon that Ex-Aid borrows.
 * Gekitotsu Smasher - Robot Action Gamer Level 3's personal weapon.
 * Trick Flywheels - Sports Action Gamer Level 3's personal weapons
 * Gashacon Key Slasher - Double Action Gamer Level X and XX's personal weapon.

Rider Machines
Bike Gamer is a small black and yellow, racing dirt bike-themed Rider Machine similar to Kamen Rider Lazer Bike Gamer Level 2. However, unlike Lazer, Bike Gamer does not possess eyes, indicating that it is non-sentient. He is used for Ex-Aid to both ride on and attack his opponent. Sports Gamer is a small black, pink, and light-green Sports Bike-themed Rider Machine. He is used for Genm to both ride on and attack his opponent with, such as when he initiates a finishing move. Ex-Aid and Genm combines with the Sports Gamer to assume Sports Action Gamer Level 3 where they are equipped with the disc-like Trick Flywheels on their shoulders for projectile throwing.
 * -|Bike Gamer= Biker Gamer
 * Length: 183cmKREA-Lazerl2side.png
 * Weight: 139kg
 * Horsepower: 150.5 ps (110.7 kw)
 * Top speed: 278 km/h
 * -|Sports Gamer= Sports
 * Length: TBASports_Game.jpg
 * Weight: TBA
 * Horsepower: TBA
 * Top speed: TBA

Trivia

 * Emu's transformation as Ex-Aid sequence has similarity to the previous riders, especially the concept:
 * His transformation sequence is almost similar to Fourze as there is a ring covering him.
 * His first transformation as the imperfect form of Kamen Rider is similar to almost all riders in Kamen Rider Kabuto. Especially during his transformation into Level 2 which uses the concept of Cast Off from Kabuto.
 * His Level Up sequence to enter a portal is truly similar to Kamen Riders Blade and Garren running through a screen.
 * When triggering Level 2, he announces "Dai Henshin!" (lit. "Great Transformation"), similar to the transformation call of Keisuke Jin when he directly transforms into Kamen Rider X after gaining the Mercury Circuit.