Swan informed Master Choi that she had been in touch with other survivors and Jedi Master Shadday Potkin organized a meeting on the planet of Kessel to discuss the Jedi's response to the Sith's revenge. However, Tsui Choi was despondent over the defeat of the Jedi and news that even younglings had been killed at the Jedi Temple on Coruscant. He felt that perhaps it was simply the will of the Force to see the Jedi defeated. However, Bultar Swan convinced him to join her on Kessel to at least listen to what the other Knights had to say. On Kessel, Tsui Choi and Bultar Swan were joined by Roblio Darte, Sia-Lan Wezz, Ma'kis'shaalas, Koffi Arana, and Jastus Farr at Shadday Potkin's request.

During the meeting, a few of the Jedi wished to put together an immediate strike force to go after Darth Vader and the Emperor. Some feared that such actions were motivated out of a desire for revenge and were uneasy going down such a dark path. Jedi Master Tsui Choi expressed his belief that the time for the Jedi to fight would come, but it was simply too soon to charge in so fast. Unfortunately, all points were moot as Shadday Potkin made arrangements of her own which would decide the Jedi's fate. Predicting the Jedi would simply fall to their old ways of debating and meditating, Shadday allowed news of the meeting to reach Darth Vader in an attempt to draw him out. Tsui Choi and the Jedi would confront the Sith Lord whether they liked it or not.

Darth Vader did not disappoint Shadday Potkin as he arrived on Kessel backed by a squad of clonetroopers. One by one the Jedi fell as they battled the Sith Lord. In the end, only Tsui Choi, Jastus Farr, and Roblio Darte remained. Using the Force together, the Jedi flung debris at the Sith Lord and managed to subdue him. Vader was saved by the arrival of his clonetroopers however who opened fire on the Jedi from above. Jastus Farr was immediately cut down and Tsui Choi and Roblio Darte took cover.

Launching himself up to the clonetroopers point, Tsui Choi to cut down the attacking soldiers. However, as he launched himself through the air, his ascent was slowed by Vader's use of the Force. For his final act as a Jedi, Tsui Choi flung his lightsaber at Vader's head and managed to slice open a section of his mask around his right eye. Unfortunately, with no means to protect himself, the clonetroopers blasted the Jedi Master out of the air. Tsui Choi fell to the ground having become one with the Force, the last of the Jedi to die on Kessel.