Prim is an individual working on board Watchers Nest who collaborates with LeBlanc. Her responsibilities include managing Rampart Armors and Integral Systems, repairing Kotoko, monitoring the physical and psychological data of cadets, analyzing information for LeBlanc, and keeping a watchful eye on their test subject, Misaki. Although she follows LeBlanc without question, there are times when her concern is primarily for Misaki, even if it means breaking schedule to give all four cadets a day off to rest. It's later revealed that Prim was genetically engineered and sees Misaki as a kindred spirit.