Shishido

is the player of the rock band Neironzu, also featuring Sora Iwamoto and Shido, whom hosted the Level 40 Kaiden Bugster. Shido accuses him of copying off his name, despite it being Shishido's real name.
==Character History==
While auditioning to preform the theme song for Genm Corp.'s next game, his bandmate Sora was injured by falling stage equipment, sending her to Seito University Hospital. As she was in recovery, he and Shido started arguing, accidentally triggering all three of their stress and causing Kaiden Level 40 to manifest from inside him alongside Motors Level 20 and Gatton Level 40 from his bandmates. The Bugsters fought Ex-Aid Double Action Gamer Level XX and , but Kaiden escaped with Gatton.
They later targeted Seito Stadium, where the band shared the dream to play at. Kaiden was intercepted by Snipe Simulation Gamer Level 50, and was soon defeated alongside the other Bugsters. The bandmates then apologized for their earlier behavior. 
== Bugster ==
: Like other Level Up Bugsters, it overtakes the host's form when they become stressed enough.
::Powers and Abilities
;Swordsmanship Proficiency
:As a boss character of Giri Giri Chambara, Kaiden possess tremendous skill in swordsmanship. His usage of Kaiden Sword-Pair implies him to be a practitioner of .
::Weapons
;
:A pair of katana utilized by Kaiden. When any Collabos Bugsters utilized the power of Giri Giri Chambara, one of the Kaiden Sword is inherited to them as Collabo Sword.
Appearances: Ex-Aid Episodes 24
==Behind the scenes==
===Portrayal===
Shishido is portrayed by , who portrayed Taro Bobuda in Kamen Rider Fourze and later Teruo Nikaido in Kamen Rider Zero-One.
Category:Ex-Aid Characters
Category:Bugster-infected Patients