William Utz is a fictional character from the novel "The Man Who Was Thursday," written by G.K. Chesterton. He is portrayed as a member of a secret anarchist council, representing the theme of chaos versus order in the story. Utz's character adds depth to the narrative, exploring philosophical ideas about identity and morality. In the novel, William Utz is depicted as a complex figure, often engaging in discussions about the nature of authority and rebellion. His interactions with other characters highlight the tension between individual freedom and societal constraints, making him a significant part of the book's exploration of existential themes.