A capable fighter and recognized as one of Suzuran's leaders, alongside fellow batch mates Kanbe Yoshikatu (a.k.a. Butcher) and Kurosawa Kazumitsu. When Hanaki Guriko makes his unexpected appearance, Harada is among those who take up arms to deal with the outsider. During his senior year at Suzuran, Harada assisted Butcher against the Jet Black Scorpions following their attack on the F.B.I.
Eventually disbanded the short-lived Harada Faction when he decided that his job was beginning to take up too much of his time.