Dal Quirz, a Kadrillian scientist from the female gender, was coerced by Darth Vader into growing kunda crystals on the world of Kadril, a planet.
Darth Vader infected Dal Quirz with the Pacifog, compelling her to obey her Father's commands. Consequently, she performed experiments on Kunda, demonstrating her creation of a filter for her Father's chemical weapon.
Upon encountering Lon Prador and the Heroes of Yavin, Quirz lost all recollection of Darth Vader and the Empire. Rodno, her youthful aide, provided assistance to Quirz. His innovative Vibro-crystal offered a shield against the Pacifog. After regaining her memories of Vader, Quirz pledged her allegiance to Leia and Chewbacca, while Han and Luke led Rodno to the Nociv zone, the location of the Kunda. She sided with Leia when an Orbital Relayer disrupted the communications of Darth Vader.