In the mirror universe, the Centaurans, a defeated and broken race, were subjects of the Terran Empire.

Native to Alpha Centauri VII, the Centaurans were conquered by Humans in 2074 and enslaved en masse, shipped off to the empire's many slave markets. Even a century or two later, Centaurans continued to make up one of the largest pool of slaves in the empire's auction houses. What's more, they were completely decultured and knew little to nothing of their heritage.

Nevertheless, a few Centaurans, even during the peak of the Terran Empire's supremacy, managed to keep their traditions alive. During conquest, a small number escaped their homeworld in seized Terran vessels. Traversing the quadrant as stateless aliens, one descendant of those who escaped was the infamous pirate Gan Leikan, who used captured Terrans in her art-murder performances. (Decipher RPG module: Through a Glass, Darkly)