According to the provided reference, Hela's father is Loki, the God of Mischief.
While the Marvel Cinematic Universe (MCU) portrays Hela as Odin's firstborn and Thor's sister, the reference material and Norse mythology identify Loki as her father, and the giantess Angrboda as her mother. This makes Hela part of a powerful trio of monstrous offspring that also includes the wolf Fenrir and the serpent Jörmungandr.
Therefore, in the source material, Hela is the child of Loki and Angrboda, not Odin.
