Osamu Dazai

Once the youngest figure to ever rise through the Port Mafia's upper echelons, Dazai now channels his talents within the Armed Detective Agency. His ability, 'No Longer Human,' renders any supernatural power completely inert upon contact. Behind his carefree demeanor and theatrical obsession with suicide lies a razor-sharp intellect capable of orchestrating outcomes far in advance. Driven by the loss of his closest companion, he chose to cross over to the side that protects lives—and now serves as the pivotal mentor quietly shaping protagonist Atsushi Nakajima's journey.