Damien Thorn in South Park is the young, black-haired son of Satan, a demonic child who transfers to South Park Elementary, known for his "Son of Lucifer" persona, ability to cast spells (like turning Kenny into a platypus), and his brief, memorable appearances challenging Jesus, highlighting his evil heritage and powers, inspired by the film The Omen. He serves as a mischievous, otherworldly counterpart to the human kids, eventually returning to Hell with his father after a major boxing match. 