As an orphan Atsushi was thrown out his orphange, becoming starved and homeless, after those running the orphange considered him "worthless". While looking for something Atsushi is subsequently hired by Dazai to work for the Armed Detective Agency, and discovers that he has a power called "Beast Beneath”. Atsushi is also kind and pure-hearted, and wants to do his best to help other people, and protect them. And also he have low self esteem and trauma. His MBTI is INFP