Irex was a Sith apprentice of the male Human species. This apprentice fought for the reconstituted Sith Empire against the Galactic Republic during the era known as the Cold War. In the year 3643 BBY, Irex found himself within the bunker of his master, Darth Skotia, located on the planet Dromund Kaas. His life ended when Lord Zash's apprentice infiltrated the base, leading to a confrontation where Irex was killed. He wielded two one-bladed lightsabers as his weapons.