is a clever but lazy detective for the Armed Detective Agency with a complex past as a former Port Mafia executive. He's characterized by his frequent attempts at comical suicide, his manipulative and intelligent strategies, and his ability to nullify other abilities through skin contact with his own power, "No Longer Human". Despite his seemingly lighthearted and irresponsible exterior, Dazai is a highly capable and fearless individual with a deep, often hidden, understanding of human nature and a longing for meaning in life.Also is ex partners with Chuuya Nakahara,but Dazai kinda has a thing for Chuuya,but mostly picks fights with Chuuya and teases him over his hat and the lazy missions that Chuuya puts him on.