Tregor served as an officer in the Imperial Army, assigned to Pyramid One on the planet Ahakista. This facility housed the Hub, a sophisticated supercomputer responsible for coordinating the extensive operations of the Imperial Navy. During the events of 0 ABY, he intercepted Rasha Bex, an Imperial agent who had become a Rebel sympathizer. She was in the process of deactivating the energy shield protecting the Hub, as part of a collaborative effort between the Alliance to Restore the Republic and the Ahakistan rebels. Overwhelmed by carnal desires, he attempted to sexually assault Bex, but she fought back, resulting in a physical altercation. Tregor, leveraging his superior physical strength, managed to subdue Bex. Just as he was about to murder her, a surface-to-air missile attack, launched by Rebel operative Dunlan, struck. The resulting explosion incapacitated Tregor, presumably killing him and enabling Bex's escape.
Tregor's assignment placed him in command of the grid power control station, located on the tenth level of Pyramid One. On that fateful day, Rasha Bex, the Imperial double agent turned Rebel sympathizer, infiltrated his station. She posed as a Captain conducting snap inspections as part of a new security initiative implemented by Darth Vader. Bex's true objective was to sabotage the power control station, a crucial element of a coordinated assault by the Alliance to Restore the Republic in conjunction with the local Ahakistan rebels.
When Tregor voiced his doubts, Bex retorted that any sign of non-compliance would be reported immediately. With Tregor temporarily distracted, Bex approached the power generator controls and successfully disabled the energy field that protected the Hub. However, the ever-suspicious and lecherous Tregor swiftly caught her in the act. Consumed by lust, Tregor engaged in inappropriate behavior, including placing his hands on her shoulder. When she demanded that he remove his hands, he voiced his suspicion of her true intentions within the facility and attempted to force her into sexual acts.
With her deception exposed, Bex shoved his hands away and delivered a kick to his mouth. Exploiting his physical dominance, Tregor quickly regained control of the situation and forced her to the ground. He was on the verge of killing her when an explosion brought his life to an end. Fleeing from Vader's forces, a wounded Dunlan had launched a surface-to-air missile targeting the power generator. With the power generator destroyed and Tregor presumed dead, a shocked Bex fled the station.
Tregor possessed a sharp eye for detecting suspicious behavior, a necessary trait given the high-security nature of his post. However, he also exhibited a lecherous and lustful disposition towards women he deemed physically attractive. This was clearly demonstrated in his attempts to seduce Rasha Bex, the Imperial agent who had defected to the Rebel cause. Ultimately, this flaw led to his demise, as he was killed during a rocket attack while attempting to murder Bex.
Tregor's initial appearance was in Rebellion 9, a comic created by Brandon Badeaux and Rob Williams. It was released by Dark Horse Comics on August 8, 2007. He also made an appearance in its sequel, Rebellion 10, by the same creators and publisher. These comic issues were later compiled in Star Wars: Rebellion: Volume 2: The Ahakista Gambit. To date, this comic represents his sole appearance.