Nonoka Mamiya is a supporting character in the anime Aria the Scarlet Ammo AA. She is the younger sister of the protagonist Akari Mamiya, though their familial relationship is not one of blood relation. Nonoka is a first-year student at Tokyo Butei High and a member of the Assault department. She has a gentle and kind-hearted personality, and she cares deeply for her friends and teammates. Nonoka is calm, collected, and reserved, often preferring to let her actions speak for themselves. She is a highly skilled sharpshooter and is noted for her impressive accuracy with a firearm, making her a valuable asset to her team. Her respect and admiration for her senior Akari are central to their relationship; she looks up to Akari as a role model and strives to become as strong and capable. Akari, in turn, treats Nonoka like a younger sister, offering guidance and support. Nonoka's background includes a tragic event that occurred prior to the story: she was poisoned by members of the organization IU during an attack on the Mamiya clan estate, an incident that ultimately caused her to lose her vision two years before the events of the series. This loss of sight does not hinder her abilities as a Butei, and she continues to serve as a composed and reliable presence within her department. Throughout the series, Nonoka plays a modest but essential role, providing steady support for her companions and acting as a dependable ally in missions. Her unwavering loyalty and precision make her a key part of the Assault department.