He is one of the students and Nagisa's close friends. He used to be a basketball player in their school's basketball club until he was assigned into class 3-E, making him kicked out from the club. He dreams to become a professional baseball player like his idol, Arita, and emulates his techniques to improve his own performance in baseball and is shown to very dedicated to it. He also sometimes used his baseball techniques in his attempts to kill Korosensei. He has a crush on Yukiko.