Valkyrie is a Marvel Comics character who first appears in Thor: Ragnarok, played by Tessa Thompson. As her name indicates, she is a valkyrie from Asgard, and a friend of Thor, often helping him defeat the forces of evil. This version of the mythological Brunnhilde was created by Stan Lee, Jack Kirby, Steve Englehart and Sal Buscema. Millions of years ago, Brunnhilde and the Valkyries were Asgard's strongest warriors, with even Thor and Loki looking up to them. After Odin had been forced…