Atty was a Stormtrooper Commander who served the Galactic Empire during its reign of the galaxy. At one point, Atty served as the field commander on Ontotho during a pacification mission. During the conflict, one of Atty's troopers reported seeing a hostile with a lightsaber, a fact which eventually made its way to the Second Sister, who along with a contingent of Purge Troopers, arrived to investigate.