The Tyrannic, an Imperial-class Star Destroyer, functioned within the Imperial Starfleet as a component of the Braxant Sector Fleet.
Captain Nalgol commanded the Tyrannic, which then joined the forces of Moff Vilim Disra and Major Grodin Tierce due to Nalgol's belief in Flim's capabilities when he posed as Grand Admiral Thrawn. As such, the Tyrannic received a cloaking shield and spearheaded the assault targeting Bothawui. However, once its position was compromised, the Tyrannic directed the Imperial withdrawal when confronted by a superior combined force.