Akira is an antagonist from JoJo's Bizarre Adventure Part IV: Diamond is Unbreakable. Otoishi was one of the many people Keicho Nijimura shot with the Bow and Arrow while trying to find a Stand user capable of killing his mutated father, being fortunate enough to develop a Stand, naming it Red Hot Chili Pepper, after which he became interested in Stands and their creation.

To further his rather self-centered goal, Otoishi uses his Stand to murder Keicho and forcefully wrest the Bow and Arrow from him. From there on, he watched and tormented several people, among them Josuke Higashikata, while trying to improve in the use of his guitar skills.