Wembly's BLX Droid served aboard the Imperial prison barge Purge during the time of the Galactic Civil War. He followed ICO Wembly everywhere, an accompaniment that other officers on board the Purge wouldn't have tolerated.
In 1 BBY, the droid was on board the Purge when it broke down while en route to the detainment moon Gradient Seven. When a boarding party was sent to a nearby abandoned Star Destroyer to search for spare parts to try and repair the barge, they contracted a virus. Upon their return, the virus spread throughout the Purge, infecting almost everyone aboard, including Wembly. Wembly would soon succumb to the virus, and with his death, his droid would appear utterly lost without its master.
- Death Troopers (First appearance)