Strok served as a captain within the Final Order fleet, commanding the _Xyston_-class Star Destroyer named Sutta. As with every officer in the Sith Eternal's armada, Strok was brought up on the world of Exegol by the Sith Eternal religious group to revere the strength of the dark side of the Force, and his entire existence was dedicated to training for the fleet's deployment. In 35 ABY during the Battle of Exegol, the Sutta became the initial Sith Star Destroyer targeted by both the Citizens' Fleet and the Resistance; the resulting damage caused the vessel to break apart. Following the destruction of its axial superlaser, the Sutta was consumed by numerous massive explosions that decimated the warship.
The reference book Star Wars: Battles that Changed the Galaxy, published in 2021, included a mention of Strok.