Frosnir Hjortu (джен)

Just before his coming-of-age ceremony, Loki is told of his Frost Giant heritage and, unable to cope, flees to Midgard where he meets Elsa, a Queen-to-be about his own age with even more issues around her ice powers. Able to hide on Midgard in relative comfort, Loki offers to tutor Elsa in her powers until the hilariously tragic events of her coronation.
Things hit close to home as Elsa fears being labled a monster and Loki can't hide from himself or Asgard any longer. But, in the end, Elsa isn't the sister who reflects Loki's problems most clearly. "Love conquers all" is perhaps simplistic, but it's not a bad place to start.
Also, Hans is a jerk, Kristoff is the reluctant voice of reason, and Thor is generally well-intentioned but tends to jump rather quickly to conclusions.