PZ-7 was a feminine RA-7 protocol droid who served the Galactic Empire around the year 2 BBY as an inventory droid at Killun Station, an Imperial Security Bureau base located on the moon Killun 71. When the Imperial-turned-rebel inventory droid AP-5 was sent to Killun Station to secure clearance codes crucial to the Rebellion's planned attack on the planet Lothal, he encountered PZ-7 before he could access the facility's Central Computer Core.