Vosa was of course outraged, but went on a mission with four other Jedi to rescue civilians from the Bando Gora, an extremely mysterious cult. Two of the other Jedi died, with Vosa and the others disappearing and presumed dead.They were actually tortured by the Bando Gora, pushing Vosa to the Dark Side until she embraced it fully. Somehow, Komari was able to become their leader, after murdering the other two Jedi in front of the Bando Gora. She began a plan of using Deathsticks to recruit new members of the cult, getting them into the populace via several buffers. These included Gardulla The Hutt, and the Dug crimelord Sebolto.Vosa's actions began to develop into a hurdle for Sith Lord Darth Sidious's own machinations towards Galactic conquest. He and Dooku, now called Darth Tyrannus, came up with a plan to not only eliminate her, but also to find the man who would father the needed Clone Army.
After a lot of time working his way down her trail, Jango Fett was the one who finally found Komari on Kohlma, one of the moons of Bogden. He was able to fight his way through many of her cult members before facing Vosa herself. Though Fett defeated her in combat, she was actually killed by Tyrannus. After Force Choking her, Tyrannus then proposed the deal to Jango that would create the army of Clonetroopers.
Vosa was not a Sith, nor did she ever claim to be. She was a Dark Jedi.