Tyr is the god of war, son of Odin is Thor's older brother. Tyr a veteran was the defender of Asgard before the time of Thor. Tyr becomes resentfull when Thor replaces him. After Sif rejects Tyr's advances, he jealously travels to Earth to attack Thor and is defeated. Later Tyr rebels against Odin due to his favoritism of Thor, he allies with Loki and unleashes the Midgard Serpent on Earth but is undone when Loki double crosses him. Since that time Tyr has reconciled and fought valiantly for Asgard during Ragnarök.