Loki is said to be the seductive Norse god of Mischief, Chaos, and fire. He is indirectly but ultimately responsible for the death of Thor and Baldr (which were killed by Hodr and Jörmungandr, respectively). He is the father of Hel, Fenris, & Jörmungandr. He is the son of two giants and referred to as the blood-brother of Odin.
Source: Hellanim