Atsuhi has white hair.
Bisexual.
Atsushi is friends with Kyouka who he saved from a exploding train
Atsushi's best friend is Tanizaki. Atsushi was recruited by Dazai who he admires. 
Atsuhi rival is Akutagawa Ryuunosuke from the Port Mafia. 
Atsushi's  special ability 'Beast beneath the moonlight' lets him turn into a white tiger.
Atsushi works at the armed Detective Agency
Atsuhi was abused by his old Orphanage Headmaster 
Atsushi also knows: Fukuzawa (ADA president) Kenji,Kunikida,Yosano,Ranpo