Sersi is a fourth generation member of the Eternals, an evolutionary offshoot of the human race. Sersi is the daughter of the Eternals Helios and Perse, and was probably born in Olympia, Greece, some time after the Great Cataclysm that destroyed the continents of Atlantis and Lemuria, during an extended ice age known as the Hyborean Age. At a young age, Sersi differed from her fellow Eternals in her desire to live amongst humans. It was during her time in ancient Mesopotamia that Sersi first met Captain America, who had traveled back in time. While Sersi still had the appearance of a child at this time, she was already thousands of years old.
A few thousand years later, Sersi was based in ancient Greece, where she met the poet, Homer. Homer would later write one of the earliest works in Western literature, The Odyssey. The character Circe, who lived on an island in the Aegean called Aeaea, and turned the hero Odysseus' men into pigs, was based on Sersi.
It was Sersi, under the name of Circe, who imprisoned the imps in Pandora's Box in ancient times.[2] Unlike the majority of her fellow Eternals, who stay in their hidden cities, Sersi revels in her humanity, and has lived amongst humans more than any other Eternal, save the Forgotten One. Thus, it is no surprise to find that Sersi has lived in various places of historical importance, from Nero's Rome, to Camelot, the Court of the legendary King Arthur, where she helped Merlin the magician to defeat an impostor who had usurped his position. Sersi fought alongside Thor in the Viking Siege of Paris, although he was not aware of this.[3] She has been a dancer, actress, stage magician, hedonist, and adventurer.