Sersi is an Eternal. She is the daughter of Helios and Perse. Sersi is the only fifth level adept, the highest possible, among the Eternals in the discipline of matter rearrangement. Amongst the Eternals it's said that even Prime-Eternal Zuras, mightiest of all Eternals, fears the power of Sersi. Sersi first appeared under the name of "Circe" in Strange Tales #109 in June 1963. She then appeared with the other Eternals in Eternals #3 in September 1976, created by Jack Kirby.