Daichi Kuga

Kuga Daichi is one of the five antagonists who bullied Shun Uruma in their middle school years, he subjected Uruma to frequent beatings and, in Uruma's words, used him as a "test kit" to try out his techniques. He's short tempered, showcased in chapter 49 when he quickly became enraged when Uruma challenged him to a Judo match, and physically abusive to everyone around him with the exception of Kyou and the three other bullies, as he regularly breaks his teammate's bones under the guise of practice and sexually assaults his female peers.