Tsui Choi was a male Aleena who served as a Jedi Master in the final years of the Galactic Republic. Serving in several Jedi campaigns during this time, such as when the Yinchorri became suddenly aggressive and fought against the Republic in 33 BBY. During the Clone Wars between the Republic and a separatist faction, he accepted the position of a Jedi General in the Grand Army of the Republic. He would fight for the entirety of the war.
When Order 66—a mandate given to the Grand Army's clone trooper forces that commanded them to execute their Jedi officers—was issued in 19 BBY, Choi managed to survive his assailants' efforts. However, approximately one month after the end of the war, he was killed during a confrontation with Dark Lord of the Sith Darth Vader on the planet Kessel, along with a number of other Jedi who had also survived Order 66.