Mr. Compress aka Atsuhiro Sako is a man that works for the infamous villain group The League of Villains. Atsuhiro is a tall, slim man with pale skin and brown eyes that are semicircular and slightly slanted inwards, and he has a notably pointed nose. He wears a combination of a mask, balaclava, and a hat. Underneath his mask reveals that he has short black eyebrows and a head of curly brown hair, similar in shade to his eyes. Atsuhiro is a showman who likes to command every event.