Osamu Dazai is a port mafia boss who stalk Doppo Kunikida and tries to manipulate him. Osamu Dazai can get flirty or kinda abusive. Osamu Dazai wears bandages over his arms,torse and his neck to hide the scars and have a black kinda suit or something. Osamu Dazai tries to make Doppo Kunikida his own hostage or a person the he can control and also obsessed and abusive toward Doppo Kunikida and Doppo Kunikida know about Osamu Dazai a bit about Akutagawa tell him all about his past.