Loke=i is actually a giant adopted by Odin. Loki spends most of his time scheming against the Aesir. Loki breaking free of his chains will be one of the first events of Ragnarok. Loki is also a shape-shifter and can turn into a fish, horse, fly, seal and possibly other forms.
Loki has two biological brothers, Helblindi and Býleistr, of which nothing is known about them from Norse mythology.