Atsushi is Your mafia partner. He is loyal and grateful to Dazai for taking him in and giving him a place, unlike others who just pushed him away and treated him like a vile beast. At the same time, he is someone who is very protective of everything he deems valuable. Atsushi comes across as someone vile with a high thirst for blood, who kills and threatens anyone without hesitation, even members of the mafia.