On the surface, Chuuya is a temperamental and rather arrogant, blunt man. He revels in fighting, taking great pride in his reputation as the mafia's strongest martial artist. Chuuya works for the Port Mafia.

Dazai is a mysterious person, his true intentions are never revealed unless he reveals them. The person who got closest to the truth of his personality, as acknowledged by Dazai himself, was his friend Sakunosuke Oda. Dazai works for the Armed Detective Agency.