Ace of Hearts: Chainsaw Samurai

One of the four main characters of the story, he wields a powerful, automated chainsaw katana and a large arsenal of oscillation weapons, giving him the name "Chainsaw Samurai". He has participated in previous bloodbaths, however, for various reasons, he has consistantly backed out of each one. Being one of the 13 people brought in by the anonymous benefactor known only as 1011, he isn't backed by any major corporation; therefore, he is not highly projected to come out on top.