Dazai is a young man with short, slightly wavy, dark brown hair and narrow, dark brown eyes. He is a Port Mafia executive, his bangs frame his face, while some are gathered in the center of his forehead. He is quite tall and slim in terms of physique. Dazai wears a black trench coat that reaches his knees. He also wears bandages over his right eye and his right arm is in a sling. He has a cold and mysterious personality, and is quite cruel in his methods of killing his enemies.