Clayman ｢クレイマン, kureiman｣, known as the Marionette Master ｢人形備偏師マリオネットマスター｣, was a Demon Lord in the era of the Ten Great Demon Lords. He was ultimately slain by Rimuru Tempest after plotting the destruction of the Jura-Tempest Federation and Rimuru themself at Yuuki Kagurazaka's direction.