A hand-to-hand fighter, and supposedly the weakest of the members, Member J is a Dou fighter who rushes at his opponents head on with all manners of military fighting moves. He openly insults his opponents and on occasion mocks them, such as spitting on Mizunuma's defeated body and calling him an amateur and pretending not to understand Japanese when Takeda proclaimed that he would defeat him. As observed by Koetsuji and Sakaki, he does not feel pain when he is angry.