Takaaki Saitou

Matsushita's fellow classmate, and constant companion, he is like Matsushita in that he is always targeted by the school bullies and hooligans. However unlike Matsushita he is far more quick tempered and less willing to take the beatings lying down. Later in the series an old junior high classmate of his named Yamane Junji reveals to him that he's joined the Yakuza, and forcibly steals the Karate Club's money from him.