Elena

Lady Elena Odinsdottir was a feared Asgardian warrior and a good friend of Loki, Thor, Sif, and the Warriors Three. When Thor almost provoked a war with the Frost Giants and ended up powerless on Earth, Elena and her friends disobeyed the orders of their new king Loki and went to Earth to save their friend. Thanks to them, Thor returned to Asgard and Loki's reign of terror ended.

Elena went with Thor to Earth to retrieve Loki after they found out he survived to fall through a black hole and had begun his attempt at world domination, having taken possession of the Tesseract, Elena briefly joined the Avengers under the guidance of S.H.I.E.L.D. and stood with them to stop the schemes of the man she still loved. She eventually followed the newly formed team as they battled against Loki's army of the Chitauri during the Battle of New York until Loki was eventually defeated by the Avengers, captured and returned to Asgard to await justice for his crimes.

Elena was in charge of Loki once they returned to Asgard, and sentenced him to life imprisonment in the Asgardian Dungeons.