Sota Suyama is a young boy who becomes infected with the Bugster virus, He is infected with an unknown illness, and refuses to be treated. When he gives his doctor Emu Hojo and nurse Ginko Yumita the slip and escapes the hospital, he sees the Gamer Driver and Mighty Action X Gashat that Asuna Karino is carrying, but quickly falls unconscious, and Asuna realizes he is infected by the Bugster virus.
He is taken to CR for treatment, but Emu sneaks in behind her and discovers Sota's love of video games, especially Mighty Action X. He takes Sota out of CR to a video game convention, but the virus inside him takes over his body, mutating him into a giant golem-like form that begins trashing the convention. Emu takes the Gamer Driver from Asuna and becomes Kamen Rider Ex-Aid Action Gamer Level 1, using his skill at video games to defeat the giant virus and revert Sota to normal; however, he is unconscious and fading. Smaller viruses that had leapt off of him then form the Salty Bugster and a group of Bugster Viruses, but they are defeated by Ex-Aid Action Gamer Level 2, after which Sota fully recovers in minutes.
Publication Information
- Ex-Aid : Sota Suyama
- Japanese : 須山 颯太
- Version : Kamen Rider Ex-Aid Series
- Type : Patient
- Infected Virus : Bugster Union
- Gender : Male
- HomeWorld : Earth
- Season : Kamen Rider Ex-Aid
- First Appeareance : Kamen Rider Ex-Aid Episode 1 : I'm a Kamen Rider!
- Last Appeareance : Kamen Rider Ex-Aid Episode 1 : I'm a Kamen Rider!
- Number of Appeareance : 1 (Ex-Aid)
- Potrayer : Ryowa Sakai
- Main View : Full Episod
Forms
Bugster Union
- Main Article : Bugster Union
- Origin : Earth
- Version : Kamen Rider Ex-Aid Series
- Type : Giant Virus
- Height :
- Weight :
- Appeareance : Ex-Aid Episod 1
- Bugster Union, when taken over by the Bugster virus, Sota is mutated into the form of a giant golem-like virus monster. It can "move" its mass from one part of its body to another; for instance, it can shrink one arm to grow the other even larger.

















