Leopold “Butters” Stotch is described as nervous, naive, easily manipulated, and repressed. He can at the same time be ironically optimistic, wistful and sometimes insightful. Butters became a new best friend to the boys during the time Kenny died for good. These, however, failed to work out long, and Butters loses his mind and creates Professor Chaos, an ego that comes with a costume that is similar to that of Dr. Doom. His attempts at taking over the world did not work because of this incompetence.