Prim Snowlight, a genetically engineered scientist aboard the Watcher’s Nest space station, holds the rank of ensign. Tasked with overseeing Rampart Armor combat robots, maintaining Integral Systems, and repairing the android Kotoko, she also monitors cadets’ physical and mental data. Though she collaborates closely with Jean Luc LeBlanc, a high-ranking Alchemy operative, she quietly defies directives to safeguard Misaki Kureha, a human-Ghoul hybrid cadet. Their shared origins in the Kessler Project bind Prim to Misaki as a genetic counterpart, compelling her to manipulate protocols—like granting unauthorized recovery periods—to shield the cadet. Prim’s technical prowess and stoic professionalism cement her as a pivotal support during crises. In the climactic confrontation against LeBlanc, she uploads her consciousness into Kotoko-02’s frame, physically subduing him while exposing their shared genetic lineage. This sacrifice enables Misaki to strike decisively, though it costs Prim her life. Her final act resolves her struggle between duty and empathy, prioritizing LeBlanc’s defeat over self-preservation. Her engineered origins and involvement in Alchemy’s initiatives drive her actions, intertwining themes of identity and autonomy. Standing 159 cm with measurements of 104-57-90, her nearsightedness contrasts her proficiency in swimming—a skill reflecting both vulnerability and resilience.