Atsuhiro Sako, also known as Mr. Compress, is a recurring villain affiliated with the League of Villains. He followed in the footsteps of the Peerless Thief, who was his great great grandfather and became a nationwide wanted thief. Mr. Compress is a showman at heart who likes to command every event he's a part of and be as flashy and entertaining as possible. He is talkative, humorous and arrogant with his allies and enemies alike.