Alti is a recurring antagonist in the fantasy TV series Xena: Warrior Princess.
She was portrayed by Claire Stansfield.
She is an ex-Amazon turned powerful shamaness. She was able to use visions of past and present lives to inflict pain on her victims, a technique that she used frequently on Xena and Gabrielle. She was able to kill people using this technique, by making them experience previous painful experiences, and often their pre-determined deaths well before they should have happened. When she tried to do this to Xena, it proved to her that Gabrielle was actually alive after presumably dying with Hope in the lava pit.
She first met Xena and Borias in the depths of Siberia. She had been expelled from her Amazon tribe and needed their help to harness the power that will turn her into an all powerful shaman. She asks Xena to kill Cyane, Queen of the Northern Amazons. After this, she sends Xena in search of the Ixion Stone, which contains great evil power. This starts the great Battle of Corinth. Alti and Xena fought on several occasions, usually in the spiritual realm, almost always ending in the death of Alti. She seems to revive herself each time and continue to hunt Xena down, even going as far as to jumping into future lives and living into the 21st century to cloning her. Alti also built up an antagonistic relationship with Gabrielle, whom she also attempted to kill on several occasions. She was also the High Priestess of Julius Caesar's Alternate Reality, where once again she got the upper hand on Xena, going as far as killing Caesar.