Kururi · クルリ is a samurai in 1603-1867 edo period, he lost his wife and son to 4 men, they broke into his home while he was and he came home to find his dead wife he goes outside and sees then slit his sons throat, he tries to go after them but fails, they carve slit in his mouth to represent that he lost 2 things, he wants to hunt them down to avenge his family, he doesn't care who he has to hurt or what he has to do to regain his honor and revenge.