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 . Biography . Et Rex , a male belonging to a species of anthropomorphic avians with cranial horns , was born during the final decades of the Galactic Republic . He was trained in the ways of the Force by the Jedi Order and eventually ascended to the rank of Jedi Knight . During this time he formed a friendship with a Human female Jedi named Alysun Celz . In 25 BBY , Celz , who had fallen to the dark side of the Force , framed Rex for crimes that she committed . He became Celz ' s prisoner and was being brought to the Jedi Council on the galactic capital , Coruscant , aboard the " Consular " - class cruiser " Radiant IX " to stand trial for the Dark Jedi ' s crimes . However , the " Radiant IX " exterior power couplings were sabotaged by a flock of mynocks , causing the vessel to crash on an asteroid known as the Poison Moon in the Hoth system ' s asteroid field . Rex managed to escape the vessel and head to the asteroid ' s surface as Celz turned against the ship ' s crew by killing them with Force lightning . When the " Radiant IX " did not arrive at the Jedi Temple , the High Council dispatched Jedi Knight Obi - Wan Kenobi and his Padawan , Anakin Skywalker , to search for and detain Rex . When they discovered the wrecked cruiser in the asteroid field , the Jedi searched the body - littered ship for signs of life and soon located Celz , who deceived Kenobi and Skywalker into believing that Rex had slain the ship ' s crew . Rex encountered Kenobi as the former was investigating the cause of the " Radiant IX " crash . The framed Jedi convinced Kenobi that he was innocent of the charges levied against him , revealing that it was Celz who had committed the crimes and murdered the crew . Rex returned to the " Radiant IX " with Kenobi , finding Celz — who intended to steal Kenobi ' s vessel — torturing Skywalker with Force lightning . Kenobi tried to intervene but was also thwarted by the Dark Jedi ' s attack . Rex rescued Kenobi and Skywalker by hurling a couple of mynocks he had at Celz , which distracted his former friend and caused her to stun herself until she was incapacitated . Rex helped Kenobi and Skywalker detain the woman , and he accompanied them and the imprisoned Celz back to Coruscant . Personality and traits . Rex did not require a breath mask when he went on the surface of the Poison Moon asteroid . He wore brown Jedi robes and carried a lightsaber . When Celz fell to the dark side , Rex refused to join her , and as a result she framed him for her crimes . He maintained his innocence to Kenobi and was willing to assist in detaining Celz , although he did so without wounding her fatally . Powers and abilities . Rex was sensitive to the Force and eventually ascended to the rank of Jedi Knight . He was able to defeat Celz by using the mynocks that were in his hands , despite his former friend unleashing bolts of Force lightning . Behind the scenes . Et Rex was created by Michael Carriglitto for the short story " " , which appeared in issues 44 – 47 of the " Dark Horse Extra " , a series of monthly four - page comic anthologies . Issues 44 – 47 were published from February to May 2002 , with the art being provided by Adrian Sibar . Rex garnered an entry in " The Complete Star Wars Encyclopedia " in 2008 .