In the fictional Star Wars universe, Tavion is a powerful Dark Jedi and the apprentice of the even more powerful Sith, Desann. Her first introduction was on the computer game, Star Wars Jedi Knight II: Jedi Outcast, where she supposedly captured and killed the New Republic agent, Jan Ors. She later confronted the Jedi, Kyle Katarn, on Bespin, in Cloud City. She lost the fight and was nearly killed by Kyle, but he let her live. Shamed, she left. Later on, Desann was confronted by Kyle and was killed.

Tavion found a merchant with a powerful Sith artifact, named the Staff Of Ragnos, which had belonged to an ancient Sith Lord on the computer game, Star Wars Jedi Knight: Jedi Academy. She took Ragnos' Staff and killed the merchant. The voice of Ragnos began to communicate with Tavion, telling her to drain the force energy so she can regenerate his cells, bringing him back to life. So she assembled the cult of Sith known as The Disciples Of Ragnos, and proceded to drain Force energy from multiple planets and areas such as Hoth, Yavin, and Bespin, all at the will of Marka Ragnos, the Sith Lord, in order to bring him back to live.

On Korriban where the tomb of Ragnos was, her apprentice, Alora, was confronted by Jaden Korr, the student of Kyle Katarn and killed. Then, while releasing the force energy Jaden Korr stops her. At this point, if the player chose the Dark Side, s/he killed Tavion.

If the player chose the Light Side, Tavion was only defeated. She then unleashed all the Force energy into Ragnos' Tomb, resulting in the resurrection of Marka Ragnos. He then possesses Tavion to kill Jaden, but fails. Tavion's body proved unable to withstand the corruption of Ragnos, so she loses her life. Jaden then destroys the Staff Of Ragnos, and the ghost of Marka Ragnos was forced to return to his sarcophagus forever. Thus Tavion, Sith and master of the Dark Side, was finally dead.