A member of the Knights of Zakuul, following the Coronation of Empress Vaylin she was hand-picked by her to join the new Horizon Guard. She was among the guards who accompanied the Empress and SCORPIO when they used subterfuge to initiate the assault on the Gravestone. After Lana Beniko and the Alliance Commander boarded the Gravestone determined to reclaim the vessel, Vaylin ordered to hunt down the intruders. Vella Zarkot located the Commander and Koth Vortena at the turbolife leading to the Dark Sanctuary and attacked them, but was defeated and killed.
Vella Zarkot appears in Star Wars: The Old Republic: Knights of the Eternal Throne Chapter III "Dark Reunions."