There are a lot of untrue statements here, so I might as well clear things up a bit.
Loki is a major character of Norse Mythology. He is often referred to as the trickster god, but he's technically a giant, son of the giant Farbauti. And despite previous definitions, he is NOT related to fire, that's a common misconception because the name Loki is similar to another name meaning fire.
Through the giantess Angrboda, He is the father of the half-dead woman Hel, the wolf Fenrir, and the world serpent Jormungand. He also once shapeshifted into a mare and gave birth to the eight-legged Sleipnir, which became Odin's favorite horse.
Loki is described as being handsome in appearance, but clever and deceitful. What makes Loki a truly fascinating character are his dynamic and unpredictable actions. Without the exciting, unstable, flawed Loki, the Norse Myths wouldn't have nearly as many interesting tales as they do today.
Loki often causes trouble for the gods. However, what's interesting is that it's often also Loki's cunning that gets them out of these messes. Many times, probably for the sake of fun, Loki helps out the gods while they are in tough situations. But at the end of the world, Ragnarok, Loki's true allegiance is tested, and he betrays the gods by fighting against them alongside the giants. At Ragnarok, he encounters the god Heimdall, and the two kill eachother.
Loki's awesome. :D
The Mythical Detective Loki. Check it out, peoples.