Who are Loki's three children?
Loki
Loki is more formally introduced by High in chapter 34, where he is "reckoned among the Æsir", and High states that Loki is called by some "the Æsir's calumniator", "originator of deceits", and "the disgrace of all gods and men". High says that Loki's alternative name is Lopt, that he is the son of the male jötunn Fárbauti, his mother is "Laufey or Nál", and his brothers are Helblindi and Býleistr. High describes Loki as "pleasing and handsome" in appearance, malicious in character, "very capricious in behaviour", and as possessing "to a greater degree than others" learned cunning, and "tricks for every purpose", often getting the Æsir into trouble, and then getting them out of it with his trickery. Loki's wife is named Sigyn, and they have a son named "Nari or Narfi". Otherwise, Loki had three children with the female jötunn Angrboða from Jötunheimr; the wolf Fenrir, the serpent Jörmungandr, and the female being Hel. The gods realized that these three children were being raised in Jötunheimr, and expected trouble from them partially due to the nature of Angrboða, but worse yet Loki.[41] In chapter 35, Gangleri comments that Loki produced a "pretty terrible"—yet important—family.[42]
Thor (film)
Loki discovers that he is Laufey's biological son, adopted by Odin after the war ended. A weary Odin falls into the deep "Odinsleep" to recover his strength. Loki takes the throne in Odin's stead and offers Laufey the chance to kill Odin and retrieve the Casket. Sif and the Warriors Three, unhappy with Loki's rule, attempt to return Thor from exile, convincing Heimdall, gatekeeper of the Bifröst—the means of traveling between worlds—to allow them passage to Earth. Aware of their plan, Loki sends the Destroyer, a seemingly indestructible automaton, to pursue them and kill Thor. The warriors find Thor, but the Destroyer attacks and defeats them, prompting Thor to offer himself instead. Struck by the Destroyer and near death, Thor's sacrifice proves him worthy to wield Mjölnir. The hammer returns to him, restoring his powers and enabling him to defeat the Destroyer. Kissing Foster goodbye and vowing to return, he and his fellow Asgardians leave to confront Loki.