User blog comment:SayuriDarling/Magnus Chase and the Gods of Asgard Official Discussion/@comment-4902593-20141130054807

I am pretty sure Loki is the villain. In Norse mythology he was the one who killed Odin's son, Baldr (who is like Jason Grace figure btw), fathered the three worst monsters (Fenrir wolf, Jormugand serpent and Hel, the goddess of Hell), gatecrashed parties and started Ragnarok. And I think he is going to get compared to the guy in the Avengers movie.

And yes, he is technically a Giant, but he wasn't brought up as Odin's son. Loki isn't completely evil though. The peasants worshiped this guy more than Odin and he once saved Freyja from a giant. Unlike the other gods from different mythologies, Norse Gods can actually die or get killed like mortals. They just live for aeons because they eat the Golden Apples of Idunn, which gives them everlasting youth.