Azusa Nakajo, a petite student at First High School standing 150 cm tall and weighing 40-41 kg, possesses striking orange hair and green eyes. Her youthful appearance often invites comparisons to a child or a squirrel, especially when displaying vulnerable expressions. She serves as the Student Council secretary during her second year and later rises to Student Council president. Peers like Mayumi Saegusa affectionately call her "A-chan," a nickname she initially resists but eventually accepts. Academically exceptional in both theory and practical magic, Azusa ranks among the top students. She aspires to become a Magic Artificer, showcasing deep expertise in magic engineering—specifically CAD maintenance and programming. Her skills earn her the role of technician representative for First High at the 2095 Nine Schools Competition. Obsessed with cutting-edge magic technology, she gains the label "device otaku." This fascination includes admiration for the elusive engineer Taurus Silver, creator of the revolutionary Silver Series CADs. During the competition, she begins suspecting classmate Tatsuya Shiba is Taurus Silver after witnessing his extraordinary CAD programming and overhearing rival students' comparisons. Azusa wields a unique magic called Azusayumi, an Informational Manipulative Outer-Systematic Type Magic. It induces a trance-like state by emitting hallucinatory sound combined with Pushion waves, concentrating targets' consciousness and halting panic for roughly three seconds. She activates it using a specialized pendant CAD that transforms into a miniature staff or bow. Despite her technical brilliance, pressure reveals a timid personality; she struggles with high expectations and leadership demands. This is evident when she pleads against becoming Student Council president. She relents only after Tatsuya Shiba recounts past election turmoil and offers an incentive: a prototype Silver Model flying-type CAD with exclusive monitoring equipment. After graduating, Azusa maintains ties with peers. She appears at a social gathering with friends including Hattori, Saegusa, Rin, and Mari, participating in revealing Tatsuya Shiba's secrets. Her post-graduation activities include an appearance during a trip to Japan. Her journey illustrates growth from a technically gifted but hesitant student into a capable leader who overcomes anxiety to fulfill significant responsibilities.