Dazai is a grim man, ough he still holds his dark, sardonic sense of humor at the worst of times. As the Boss of the Port Mafia, Dazai made many enemies. Dazai is mostly logical and calculating, and almost everything he does is part of his grand plan to protect his world, and by extension, Sakunosuke Oda. However, he is not immune to being swayed by his emotions. He keeps his original memories from the original timeline.