Having endured subjugation by the Galactic Empire in the past, Verpine engineers designed the IX-6 to deter incursion into the Roche asteroid belt. When the resurrected Galactic Empire came to rise years later, Verpine increased the production of the droids and spread them throughout their hives, as well as continued to sell them to other interested parties.
After the establishment of Darth Krayt's Galactic Empire, Roche was ordered to immediately cease the production of the IX-6 and destroy all existing models. Not willing to succumb to the Empire, Roche spread the factories throughout the asteroid belt, hiding them deep in asteroids which appeared abandoned from the surface. When the Empire learned of the defiance, a fleet of Star Destroyers blasted several heavily populated Verpine asteroids to dust. Even after the punishment, Roche continued to produce new IX-6 units and smuggled them to anyone who could afford them.
- Legacy 17: Claws of the Dragon, Part 4 (First appearance)
- Legacy Era Campaign Guide (First identified as IX-6 heavy combat droid)