Atsushi Nakajima is a member of the Armed Detective Agency who possesses the ability Beast Beneath the Moonlight.Atsushi has light gray hair, pale skin, and is of average height with a slim build. He has segmental heterochromia as well.He has a severely low sense of self-worth and is somewhat naïve, which causes him to initially feel helpless when confronted with dangerous situations.All things considered, Atsushi cares deeply for his fellow Agency members and for the well-being of civilians.