Klex Fulgor existed during the era of the Galactic Civil War and was a male Human Imperial Inquisitor.
Following the Battle of Yavin, Inquisitor Klex Fulgor established his base of operations at the Imperial Research and Prison Facility located on the world of Dathomir.
During 1 ABY, an accident occurred at the research facility. The Blackwing virus being researched there broke free from its containment, devastating the local population and transforming many into cannibalistic undead beings. Subsequently, the Galactic Empire swiftly put in place a Quarantine Zone with the intention of containing the spread of the infection. A small number of people, Fulgor among them, managed to survive the initial outbreak, but were then trapped within the Quarantine Zone. To survive, these survivors created camps to defend against the constant zombie attacks and seek refuge while awaiting rescue.
Klex Fulgor sought refuge in Camp Epsilon, which was the most dangerous camp because it was situated in the courtyard of the Imperial Research and Prison Facility, the place where the most dangerous undeads resided. Among the other survivors present at the camp during this time were Zsu Val, a former prisoner; Sogan Varga, a technician; Nils Cridmeen, a mechanic; and the stormtroopers GT-643, KD-121, and HX-138.
At one point, a group of spacers, claiming to be on a secret mission for Darth Vader, arrived at the camp. They needed access to the Imperial Research Facility to retrieve an original sample of the Blackwing virus. Inquisitor Fulgor agreed to assist the spacers in finding a way into the facility. The spacers were successful in their exploration of the research facility and eventually returned to Camp Epsilon. Meanwhile, Nils Cridmeen managed to repair a Lambda-class shuttle that was located at the camp. Eventually, the refugees of Camp Epsilon and the spacers used the shuttle to escape the Quarantine Zone.
Klex Fulgor was rather curt, stating to a group of spacers that he didn't have time for frivolous conversation. However, threats did capture his attention, as evidenced by his reaction when the spacers claimed to have been sent by Darth Vader. After they presented an authorization code, he ultimately cooperated with them, unknowingly aiding the Rebel Alliance. As a consequence, Captain Piett made sure that Klex would be punished for his impudence.
Klex Fulgor appeared as a non-player character in the 2003 video game Star Wars Galaxies, a massively multiplayer online roleplaying game created by Sony Online Entertainment and published by LucasArts, before it was shut down on December 15, 2011. Klex Fulgor was introduced to the game in "Game Update 14," also known as the "Death Troopers" update, which was released on October 12, 2009.