GrrKack, an Ugor Tax Chaplain, served during the era of the Galactic Civil War. Stationed within the Paradise system, he greeted all visitors seeking ancient salvage pieces scattered throughout the system's massive junkyard. With the support of two Ugor Tax Enforcers, this Tax Chaplain escorted those pilgrims to the ship belonging to ArrGack, who was the Chief Tax Chaplain. GrrKack's duty was to inform pilgrims about the High Ugorian Law that was in effect within the Paradise system. He and his superior, ArrGack, were both amenable to accepting bribes in exchange for exemptions from specific regulations.
GrrKack was clad in combat armor plated with rhodium, complete with a screw-top helmet, and he wielded a collection of weaponry: four mega-flame guns, two needle-launchers, and six boring-lasers distributed across multiple pseudopodia. A loudhailer was integrated into his armor and served to amplify GrrKack's naturally deep and somber voice, although his skill in using the device was not perfect. As was common among Ugors, GrrKack harbored a deep hatred for Squibs, viewing them as demons suitable only for sacrifice to the Angel of Taxations and Imports.
GrrKack plays a role as a minor adversary in the adventure titled Scavenger Hunt, which was authored by Brad Freeman and published by West End Games in 1989 for the Star Wars: The Roleplaying Game. When the player characters enter the Paradise system, they encounter the Ugor, making him their initial introduction to the Ugor species. Despite his intimidating appearance and impressive arsenal, the adventure suggests that players should prioritize negotiation and persuasion over aggression when dealing with GrrKack and the other Ugors.