Nagisa is the secondary heroine, and the fourteen-year-old partner of Iczer-3. She lives on a lunar colony with her best friend Kawai Shizuka, and works part-time at a fast-food delivery service. When Neos Gold's forces attack, she is at the Moonbase delivering food to the crew of the . When Fiber takes Kawai hostage, she offers herself instead, and is about to be attacked when Iczer-3 intervenes. From that point on, she becomes a key player in the war against Neos Gold's evil forces.