Loki (Once Upon a Time)

Loki Laufeyson is the main antagonist of The Avengers of Storybrooke, a crossover between Once Upon a Time and Marvel's The Avengers.

Personality
Despite his coldness, Loki genuinely loves his daughter,  Laura, and was devastated when the Black Fairy took her from him. He initially blamed Thor for it, but later learned the truth at least thirty years later.