Carl Gallagher

Carl Francis Gallagher aged 16, is the second-youngest Gallagher child. He shares a room with Lip and Ian, who try to keep their more adult interests from him. Carl is often in trouble at school for attacking other students. In his early years, he displays several psychopathic tendencies such as mutilating his toys and killing stray animals, although this behavior seems to be less prevalent as he ages. Carl's bad tendencies don't emerge until he meets his grandmother Peggy who encourages his behavior. He also begins to show concern for his father Frank and is one of the few children to call him Dad. His bond with Frank is strengthened after Frank convinces him he has cancer (for one of his schemes—later "cured").