Loki

Son of Laufey, "Lopt", blood-brother of Odin and companion of Thor, a giant by birth who lives among the gods; father of the wolf Fenrir and of Sleipnir, the mocker of every god in Lokasenna, the one who admits the blame for Baldr's death, bound with his son's bowels until Ragnarok, when he steers the ship of Hel's people against the gods.