Agent is a Sangvis Ferri Rear Command Doll (后方指挥人形) in charge of liaising between Elisa and her Sangvis subordinates as well as logistics management. As a high-ranking unit adept at both combat and tactics, she's able to command all Dolls in combat, and they all directly answer to her. Calm and composed, she always speaks in a courteous tone to friends and foes alike. However, apart from the genuine respect she has for her master, she holds everyone else in low regard, especially Griffin.