Loki Laufeyson also known as Loki, is the brother of Thor and the God of Mischief. He is the adopted son of Odin. Growing up he and his brother Thor had a big dislike for eachother. It got to the point that, Loki became the villain in the first Avengers movie. He appeared in all of the Thor movies. He died in Infinity War, when he tried to trick Thanos by pretending to give him one of the Infinity stones, but was plotting to kill him. Thanos strangled him to death. He came back to reprise his role as Loki in 'Avengers: Endgame' but as the villainous Loki.