Aoi Tomosato is a support staff member for the organization S.O.N.G., primarily working from the command bridge of their submarine headquarters. She has dark blue hair and stands 164 cm tall, typically wearing a blue jacket over a blue dress with black tights and shoes. Her given name, written in hiragana, refers to the Japanese word for blue, while her surname combines the kanji for friend and village. Tomosato maintains a calm and composed demeanor, showing trust in her colleagues and the Symphogear users she assists. She works closely with Sakuya Fujitaka under the command of Genjuro Kazanari, handling operational support during missions. Her duties include monitoring combat situations, managing information leaks, explaining technical matters such as the significance of relics like Durandal, and contributing to strategic discussions about the Symphogear system’s development and international political implications. She also helps coordinate logistics like the transport of important artifacts, offers refreshments after training, and joins in lighter moments, such as celebrations with party poppers. Her role is primarily support-based rather than frontline combat, and she appears in the anime, the manga adaptation, and the mobile game Senki Zesshō Symphogear XD Unlimited.