Qataka

Qataka was a brilliant but amoral inhabitant of Anu. Obsessed with a fear of death, and having heard stories of the Time Lords, she sought to grant herself immortality. She experimented with cybernetics, making several breakthroughs, then began stealing brain tissue from others. She linked her own brain to a computer to preserve her memories, and found that she could use this to dominate the minds of others. Qataka's crimes were discovered and she was captured, tried and executed. However, her computerized mind was uploaded into a cybernetic body constructed by her slaves, which resembled a giant snake with a platinum alloy skin. She and her slaves then fled Anu, destroying it with a cobalt bomb. Utnapishtim and his followers, having left Anu earlier, pursued her to the Sol system and battled her. Qataka's slaves all died and her ship was destroyed, but she used an escape pod to land on Earth. Shortly after arriving there, she took on the identity of Ishtar. (NA: Timewyrm: Genesys)