A regular at Valhalla, home of the Norse gods, Loki was not a god but a particularly mischievous Trickster (see above). Blood-brother to Odin, King of the Gods, Loki usually escaped serious retribution from his wildly cunning exploits. Often, however, the gods required he right his vicious pranks, including his theft of Idunn's Golden Apples of Immortality. Like his West African counterpart Anansi (see above), Loki possessed the ability to assume the form of various animals.
When Sam and Dean learn they are dealing with a trickster, Bobby tells them tricksters are more like demigods. Naming Loki in Scandinavia and the Anansi in West Africa. Telling them tricksters are immortal and can create things out of thin air.
When the various gods meet to deal with the coming Judeo-Christian Apocalypse, it is revealed that the archangel Gabriel, has been hiding on Earth as a trickster for millennia, and is known to the group of pagan gods as Loki.