Et Rex

Et Rex was a male alien Jedi Knight who served the Jedi Order during the final decades of the Galactic Republic. In 25 BBY, Rex was framed for crimes that he did not commit by his friend and fellow Jedi Knight Alysun Celz, who had fallen to the dark side. As he was being taken back to the Jedi High Council on Coruscant to stand trial, the cruiser Radiant IX crashed on the Poison Moon asteroid in the Hoth system. Rex escaped to the asteroid's surface as Celz, now a Dark Jedi, proceeded to kill the ship's crew. When Jedi Knight Obi-Wan Kenobi and his Padawan, Anakin Skywalker, investigated the crash, Rex eventually met with Kenobi as Skywalker stayed aboard the Radiant IX with Celz. Rex persuaded the Knight that Celz had fallen to the dark side and helped Kenobi incapacitate Celz, who was torturing Skywalker with Force lightning. Rex went back with Kenobi and Skywalker to the Jedi Council, with Celz as their prisoner.

Text and facts from the “Et Rex” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.