Yusei Matsui is a Japanese manga artist. He was an assistant of Yoshio Sawai, the manga artist of Bobobo-bo Bo-bobo. Two of his manga Neuro: Supernatural Detective and Assassination Classroom were serialized in Weekly Shōnen Jump. Both were adapted into anime television series and Assassination Classroom was adapted into two live action films as well. His favorite manga series include Bobobo-bo Bo-bobo, JoJo's Bizarre Adventure, and Ultimate Muscle. In episode 25 of the Neuro anime, he has a cameo voice as a manga artist.