Atsushi Nakajima

Height: 170 cm (5'7")
Ability: Beast Beneath the Moonlight

He came to Yokohama after being driven out of a poor orphanage that was attacked by a man-eating tiger. On the verge of starvation, he meets Dazai and gets a job helping at the detective agency. Because he's never had friends or family and was labeled as "useless," he lacks self-confidence.

(Source: Bungo Stray Dogs Wiki)