Ralesk was a Human male Sith who served as one of Lord Grathan's top assassins during the Cold War. In 3643 BBY, he was sent by Lord Grathan to eliminate Darth Baras' apprentice for murdering Beelzlit and Cellvanta Grathan. Ralesk was present in the hangar when the apprentice was given a mission to track down Nomen Karr and Jaesa Willsaam. Ralesk engaged the Sith Warrior to impress his master, but was easily beaten.