Jestat Vhool, a male Keshiri Sith Master, belonged to the Lost Tribe of Sith's armada. He commanded a trio of Kondo-class assault shuttles and journeyed to Pydyr to rendezvous with Vestara Khai. Upon encountering Abeloth, Vhool, like numerous other Sith, succumbed to her illusory powers. After her departure, he regained his senses and prevented Luke and Ben Skywalker from escaping. However, the arrival of a Jedi StealthX squadron disrupted the Sith, enabling the Skywalkers' departure.
Jestat Vhool, a male Keshiri, possessed Force-sensitivity and originated from the planet of Kesh. Achieving the rank of Sith Master within the Lost Tribe of Sith, he held a commander position by 44 ABY, overseeing three Kondo-class assault shuttles within the Tribe's armada. Stationed on Boonta, he received a communication from Sith apprentice Vestara Khai, requesting reinforcements on the moon Pydyr. Vhool, accompanied by Sith Saber Gavar Khai and High Lord Sarasu Taalon, journeyed to Pydyr. There, they encountered Grand Master Luke Skywalker and his son, Ben, who had been traveling alongside Vestara Khai.
At Taalon's instruction, the Sith opted to temporarily spare the Jedi, as Taalon sought to understand his transformation from Abeloth. Following his immersion in the Pool of Knowledge, he had gradually begun to resemble her. The Sith and Jedi traveled to the Fallanassi village concealing Abeloth, battling through illusions created by the White Current. During their journey, one of the Sith shuttles, the Obuuri, met its destruction. Upon reaching the village, Abeloth—inhabiting the body of the Fallanassi Akanah Norand Goss Pell—unleashed visions upon the Sith, initially targeting Gavar Khai, but subsequently affecting Vhool and the entire Sith contingent, excluding Sarasu Taalon and Vestara Khai. The Sith perceived translucent green phantoms exhaling vapor, causing them to appear decades older, and piercing them with tentacles, feeding on their fear and solidifying their forms. The Sith scattered, fleeing the village; some even plunged into the surrounding ocean, meeting their demise.
During Vhool's encounter with these visions, the Jedi confronted Abeloth, defeating her once more and compelling her to flee. As she departed the planet, Vhool and the remaining Sith gradually regained their senses. Vhool swiftly noticed Vestara Khai and the Skywalkers heading towards the Jedi's ship, the Jade Shadow. He intercepted them, instructing them to await Taalon's arrival before tending to their injuries in the medbay, and directed Khai to prepare the vessel for departure. Khai initiated the Jade Shadow while Vhool returned to the battle site to locate Taalon. Suddenly, a squadron of Jedi StealthXs arrived to aid the Skywalkers, and Vhool discovered Khai's betrayal in killing Taalon—unbeknownst to him, to prevent Taalon's transformation into another being like Abeloth—and began to charge the Jade Shadow calling for her to be stopped. However, Khai retaliated by firing the Jade Shadow's blaster cannon at the Sith, granting the Skywalkers the necessary time to board the vessel and escape.