Emperor's Will functioned as a Victory-class Star Destroyer and, subsequent to the events of the Battle of Endor, received its assignment to the defense fleet protecting the Imperial Center.
Following Rogue Squadron's successful infiltration, and the subsequent invasion by the New Republic, the Emperor's Will avoided combat. Instead, Ysanne Isard deployed it, alongside the Imperator, to commence the construction of a novel Imperial capital in another region of the galaxy.