Clayman is a major antagonist in the anime and light novel series 'Tensei shitara Slime Datta Ken' (That Time I Got Reincarnated as a Slime). As one of the Demon Lords, Clayman is known for his cunning, manipulative nature, and his ability to control others like puppets. He orchestrates numerous schemes behind the scenes to gain power and influence, often clashing with Rimuru Tempest and his allies. Clayman's actions and ambition make him a central figure in the series' conflicts.