Grenz Zittoun was an Aqualish individual, identified as male, who belonged to the Lok Revenants. He resided on Lok during the era of the Galactic Civil War.
Following the Battle of Yavin, Zittoun became a member of the Lok Revenants, serving as a lieutenant under their commander, Nym. His workplace was Nym's palace, situated within the city referred to as Nym's Stronghold.
During 1 ABY, Zittoun participated actively in the majority of the Lok Revenants' significant operations. In that year, the Lok Revenants launched an assault on the hideout of their adversaries, the Sulfur Lake Pirates, aiming to recover the essential memory module from an Imperial droid. Zittoun instructed a spacer involved in this mission to eliminate a bizarre creature known as Nym's Girlfriend, in order to remove it as a mocking symbol for the pirates. In the same year, the Lok Revenants executed a raid on an Imperial mine where the release of a mysterious poisonous gas had driven the miners to madness and aggression. Zittoun tasked the spacer with killing two miners, the foreman Rel Rogock and the mine controller Teemu Komo, who were accountable for indiscriminate attacks on Lok's inhabitants. Subsequently, the Revenants attacked an Imperial research facility located on Lok with the intention of stealing experimental weaponry that had been developed and manufactured there. On this occasion, Zittoun requested the spacer to eliminate Kell Lapaz and Udo Barnet, who were the leaders of the mercenaries that were defending the facility.
Zittoun appeared as a non-player character within the 2003 video game titled Star Wars Galaxies, a massively multiplayer online roleplaying game created by Sony Online Entertainment and distributed by LucasArts, before its termination on December 15, 2011. Zittoun's inclusion in the game occurred as a component of the updated "Nym's Theme Park," which was launched alongside "Game Update 16," on March 23, 2010.