Athex was a human male who served as a spy in the Alliance to Restore the Republic. Sometime prior to the Battle of Scarif, Athex led a rebel intelligence mission to the planet Mustafar with the droid K-2SO. Although the mission was ultimately a success, Athex was killed by Darth Vader.
Athex was a character created for the virtual reality experience Star Wars: Secrets of the Empire, in which he was voiced by Star Wars veteran Sam Witwer. Athex wore the armor of an Imperial Transport Pilot, which was first identified in the 2018 LEGO Star Wars Darth Vader's Castle 75251 set.