Atsushi Nakajima - Before becoming one of the detectives of the Armed Detective Agency and a student of Osamu Dazai, he lived in an orphanage from which he was expelled.Possesses the ability "Moonlight Beast". Atsushi is a student of Dazai Osamu and a subordinate of Fukuzawa. Atsushi is very shy and unsure of himself. He never uses foul language and speaks politely to everyone. Quite skittish. Atsushi refers to Dazai with exceptionally respectful "Dazai-san".