Rulf Yage was a hardliner Human male Moff and a decorated Grand Admiral during the time of the Fel Empire in 130 ABY. As a member of the Imperial Navy, Yage originally served as the commander of Skull Squadron, an elite unit of Predator-class starfighters assigned to defend the Imperial capital world of Bastion, before being assigned as the coordinator of starfighter tactics on the Star Destroyer Ephin Sarreti, attached to the Second Outer Rim Fleet. As his career continued, Yage became a member of the Council of Moffs, representing the interests of the Navy. He married fellow Moff Nyna Calixte at one point in his life. Calixte eventually left Yage for High Moff Morlish Veed, but not before the marriage produced a daughter, Gunn, whom Rulf treated as the son he always wanted.