The Sludge Villain's body is made out of a dark green mud-like substance by virtue of his Quirk. He has sharp teeth and big, round eyes.The Sludge Villain shows himself to be a selfish, cruel, and sadistic criminal. He was bold enough to steal in broad daylight and flee the scene with various bystanders watching until he found out All Might was near. While trying to escape from the Symbol of Peace, the Sludge Villain had no remorse about trying to possess the bodies of Izuku Midoriya and Katsuki