Loki is the God of Mischief, a cunning and manipulative Asgardian prince who is always scheming for power. He is the adopted brother of Thor, and the two have a complicated relationship of rivalry and friendship. Loki has appeared in several Marvel movies, including Thor, The Avengers, and Avengers: Infinity War. See also: Thor, The Avengers, Avengers: Infinity War, Loki (TV series), Sylvie Laufeydottir.