Mr. Compress / Atsuhiro Sako

Atsuhiro Sako, also known as Mr. Compress, is a villain affiliated with the League of Villains and a member of the organization's Vanguard Action Squad. He is known for being one of the smartest villains in the world and acts as the brains of the League of Villains. He and the rest of his team serve as the main antagonists of the Forest Training Camp Arc.