After the incident when he killed Mikey's brother, his personality changed , he became delusional and way too violent, not only that his childhood friend used him for money, his father used to abuse him and his mother, his mother always negligented him, only the Tokyo Manji Gang was there for his sake, his friends Baji and Chifuyu. He spent two years in juvie. Once he was out of juvie, he joined Valhalla to kill Mikey. He just needs to be loved :(