Lillith

One of the Fallen Angels who enlisted with Lucifer's attempt to conquer Creation. She followed Lucifer to the dimension called Hell, her blackened spirit corrupting and fouling the world around her. As mortals began to come into existence, inevitably souls would fall to Hell to fester in their own misery. Curious and lacking any ambition to rule Hell or acquire more power, she began visiting mortals. To some she would present as a deity or goddess, sometimes maternal, sometimes malicious. Fickle and inconsistent, Lillith clashed with the First Gods on occasion, meandering through prehistory on many worlds.

Powerful as she was, Lillith was arrogant and proud. Upon revealing herself to Atlantis and attempting to assume dominion over them, she was overwhelmed by the power of Merlyn, the Atlantean Magi, the Vishanti and even the Demiurge itself. They defeated the ancient Fallen Angel, and resolved to lock her away. She was imprisoned in the bones of Tiamat, a dead god from the Annunaki pantheon. Her prison was placed on an island eternally protected by ice and wind, unapproachable and barren.