T-3PO, a protocol droid of the blue-colored variety, was stationed on Trevura throughout the era of the Galactic Civil War. He functioned in service to S-R6, an assassin droid that operated within Voma, a city located on Trevura, with the purpose of procuring illicit and prototype Imperial blasters. These blasters were brought in by Merno Blask, who held the position of governor in Voma.
Subsequent findings revealed that T-3PO had undergone reprogramming, granting him the capability to utilize a blaster, thus equipping him to defend himself in combat situations.