Trill, a Force-sensitive humanoid slave belonging to the Infinite Empire, received training from the Rakata to become a Force Hound. Serving Predor Skal'nas, she found herself in rivalry with another Force Hound, Xesh. She discovered a planet brimming with the Force located in the Deep Core, but she declared its inaccessibility due to the treacherous pathways created by black holes and stars. Xesh boasted about succeeding where she failed, provoking her to attack. Just as the stronger Xesh was about to defeat her, Skal'nas intervened, saving her life and ordering Xesh to journey to the planet.
Shortly after this, Skal'nas lost contact with the ship and, in a fit of rage fueled by the thought of being surpassed, violently tossed Trill around. Trill then asserted that she possessed the ability to track Xesh to his destination. Skal'nas was reassured by her claim that she could track her fellow broodmate.
Reflecting on her history, Trill remembered how she and Xesh had watched out for one another as children, with her often protecting him. However, when they were forced to compete, Xesh emerged victorious and suggested she be given to Skal'nas. This was intended as both an insult and a gift, saving her from being devoured by their Rakatan master. Trill, deeply hurt by his betrayal, harbored a strong desire for revenge.
Arriving on Krev Coeur in her pursuit of Xesh, Trill fought off the ravenous predators that infested the crystal mountains. Ultimately, she encountered Sek'nos Rath, a Je'daii Journeyer who boarded her ship mid-air during a battle involving Xesh and Daegen Lok. Concealing her true identity as a Force Hound, Trill attempted to manipulate Sek'nos, hoping he would lead her to Xesh and provide her with information about Tython and the Je'daii.