Callisto

Callisto is a recurring foe of Xena, the Warrior Princess, though she also crossed over onto it's parent show, Hercules: the Legendary Journeys. Callisto is a dark mirror for Xena, and her primary focus is to destroy Xena's life. She is consumed with a lust for battle, and though she fights on par with Xena, she lacks the Warrior Princess's cool head, and often loses control of herself in battle. She blames all of her problems on Xena's destruction of her hometown. The character of Callisto presents an interesting ethical dilemma for the heroine: if Xena kills her, she will just be finishing the work she started all those years ago, but if she lets her live, Callisto will continue to destroy innocent lives and wreak havoc.

She is portrayed by actress Hudson Leick.

The Birth of a Demon
Callisto was born in a town called Cirra, an unremarkable town in an unremarkable part of Greece. The young girl would have lived an equally unremarkable life if not for a raid conducted by a certain Warrior Princess, resulting in the death of her family (though in a Hercules episode, it is revealed that Callisto herself was responsible through time travel). This drove Callisto completely mad, and she began a path of violence and death, turning into a warlord.

Many years later, after Xena's redemption, Callisto begins raiding villages and killing innocents in Xena's name. The real Xena catches wind of this, and

Angels and Demons
After being killed by the Hind's Blood Dagger, Callisto is sent to Hell, which she claims Tartarus pales in comparison to. She is given the opportunity to return to life if she can corrupt her nemesis and install Caesar as Emperor of Rome without hurting Xena. However, her blind rage causes her to fail at both tasks, and she returns to Hell as Xena is raised to Heaven following her crucifixion. Callisto attacks Heaven in an attempt to drag Xena and Gabrielle down to Hell with her, and Xena sees firsthand the suffering of Callisto. In a heroic act of kindness, Xena gives up her Light to save Callisto from damnation.

Callisto meets Gabrielle again in Heaven when the demonic Xena attacks Heaven. Through the God of Love, Callisto helps the prophet Eli bring Xena and Gabrielle back to life. Soon after, Xena becomes impregnated immaculately. The fact is that Callisto reincarnated herself as Xena's child, restoring Callisto the family that Xena from her and the child Callisto took from Xena.