Thulough existed during the Galactic Civil War as an intelligence officer with the rank of lieutenant for the Rebel Alliance. At one point, he embarked on a mission to Aurilia located on the planet of Dathomir. Following the Battle of Yavin, his assignment involved the capturing of the Star Destroyer called the Blackguard from the Imperial Captain Andal Sait, a traitor who had declared himself a Grand Admiral.
Within the 2003 video game Star Wars Galaxies, Thulough was featured as a non-player character. This massively multiplayer online roleplaying game was created by Sony Online Entertainment and distributed by LucasArts. The game was shut down on December 15, 2011. Thulough became part of the game on November 1, 2007, when the "Star Destroyer" Heroic Encounter was introduced with the release of the "Chapter 8" update.