Atmos, the "Water Buffalo", is a member of the Whitebeard Pirates and serves as the Thirteenth Division Commander.
Atmos is a supporting character in the One Piece series that was created by Eiichiro Oda. The series first began serialization in Shueisha's Weekly Shōnen Jump on August 4, 1997. He would later appear in the Marineford Arc that began in Volume 57.
His first manga appearance was in splash page on One Piece Volume 57 CH. 553 "Conflict at the Summit".