The Krex were a sapient race indigenous to the world of Rokirex. Appearing humanlike, this race was heavily built, had hands with five fingers, prominent jaws, and were taller than numerous other humanlike races because of the sizable horn atop their heads. One Krex, known as Grenkk, was employed at Club Vertica Casino as a doorman during a Soovada happening. Furthermore, General Ardinondu Dipolus Daeruun was also a member of the Krex.
The Krex are a recently developed race specifically for Star Wars: The Old Republic. Only one member of this race, Grenkk, makes an appearance during the Nightlife event; however, he remains silent. Initially, the race was not named within the game itself, but the name of Grenkk's race was discoverable within the game's data. Update 5.9.2 brought a new item, the "Rotworms Player (Krex)" decoration, marking the first formal acknowledgment of the race's name. The Jedi Under Siege narrative from version 5.10 presented a different Krex, General Daeruun, and incorporated a codex entry dedicated to the Krex.