Halrii, a Twi'lek of the male persuasion, held the rank of sergeant within the White Maw organization. He operated during the Galactic War, a conflict that pitted the reconstituted Sith Empire against the Galactic Republic. During the year 3642 BBY, Halrii was a member of Kandhar's group when they convened with Tarkus, an Imperial commander. The Voidhound disrupted this gathering by publicly challenging Kandhar's intentions regarding the arrangement. As a result, the Devaronian decreed the execution of his own subordinates, who then proceeded to eliminate both Kandhar and the Imperial officer.