Bio: Jedi Master of Theen Fida. From Aleena. Tsui was mostly a cameo player in various stories set in the prequel era. He tended to be shown as one of the older and wiser of the Jedi. Perhaps because he was almost always shown with a padawan (or at least younger Jedi), his dialogue tended to be that of a "substitute Yoda".
Nowhere is this more evident than the one story in which he's the nominal lead, "Purge". In that post-Revenge of the Sith tale, he is shown to be a survivor of Order 66 who gets drawn into a failed plot to assassinate Darth Vader. Though he and his cadre of "lesser" Jedi do considerable damage to the Dark Lord, they are all ultimately killed. Instead of weakening the Empire, their demise builds a legend around Darth Vader of being a "Jedi Slayer".