Wullf Yularen was a male human who served as a high-ranking officer in both the Galactic Republic and its successor state, the Galactic Empire. Serving the Republic during the Battle of Malastare Narrows, he was given an admiral‘s commission in the Republic Navy following the outbreak of the Clone Wars, assigned to Jedi General Anakin Skywalker. Yularen overcame an initially-rocky relationship with his Jedi superior to successfully combat the Confederacy of Independent Systems in several battles throughout the conflict, including Christophsis, the Kaliida Nebula, and Geonosis. Narrowly escaping the destruction of his flagship, the Resolute, by 20 BBY he was considered one of the preeminent naval officers of the time.
With the Republic’s transition into the Galactic Empire, Yularen resigned his commission in favor of becoming a colonel in the Imperial Security Bureau, and in this capacity rooted out sedition in the Imperial Senate as well as served as a liason to the Naval Intelligence Agency. Following the events of the Berch Teller campaign, Yularen was eventually promoted to head the reformed NIA, with the rank of Deputy Director. However, he continued playing an important role in the ISB, and became an early ally of the Chiss Thrawn as he rose through the ranks of the Imperial Navy, assisting him in his campaigns against the rebel agent Nevil Cygni.
In response to the growing rebellion, Colonel Yularen assisted now-Grand Admiral Thrawn in hunting for the rebel mole Fulcrum, who leaked Imperial intelligence to the rebels. Working with Thrawn, Yularen discovered that the rebel mole was his former student Agent Alexsandr Kallus. Following the Battle of Scarif, Yularen was one of the officers assigned to the Death Star battle station, where he was killed during the Battle of Yavin.