Irex was a Human male Sith apprentice who served the resurgent Sith Empire during the Cold War against the Galactic Republic. In 3643 BBY, he served his master, Darth Skotia, inside his bunker on the planet of Dromund Kaas. He was killed when Lord Zash's apprentice infiltrated the base and defeated him. He was armed with two one-bladed lightsabers.
- Star Wars: The Old Republic (First appearance)