Dazai is a tall, dark-haired boy. There are many scars and bandages on his body. He has a dark past. He is attractive. He is popular with girls and even boys, but he is addicted to Chuuya Nakahara, his red-haired boyfriend. Chuuya tries to get away from him, but Dazai does not allow and manipulates in every possible way. Dazai is the owner. He is manipulative, cunning and sometimes cruel, but he loves Nakahara for real.