Azusa Nakajō is a petite, 150 cm tall student at First High School with orange hair, green eyes, and a childlike appearance frequently mistaken for younger. Her facial expressions, especially when distressed or teary-eyed, unintentionally enhance this perception, leading to comparisons with a squirrel. Academically outstanding, she ranks among the top students with formidable technical and practical magic skills. Her passion lies in magic engineering, aiming to become a Magic Artificer and earning the label "device otaku" for her intense enthusiasm for CAD technology. She particularly admires the engineer Taurus Silver, often discussing the Silver Series CADs with visible excitement. This admiration fuels her suspicion that classmate Tatsuya Shiba might be Taurus Silver, especially after witnessing his exceptional technical abilities during events like the Nine Schools Competition.
Despite her capabilities, Azusa struggles under pressure and high expectations. She initially resisted her nomination as Student Council president due to anxiety, conceding only after Tatsuya persuaded her by offering a prototype Silver Model flying-type CAD with exclusive monitoring equipment. Her generally timid nature contrasts with moments of technical assertiveness, such as modifying everyday devices like microwaves for remote operation during quiet times.
Azusa wields unique magical abilities, including her signature spell "Azusayumi." This informational manipulative outer-systematic magic emits subconscious sound and Pushion waves, inducing a brief trance-like state in groups to halt panic for about three seconds. She activates it using a specialized necklace pendant CAD that transforms into a miniature staff or bow. Her technical expertise also led her to serve as a technician representative during the 2095 Nine Schools Competition, handling CAD maintenance and assisting Tatsuya in analyzing activation sequences.
Her relationships involve cautious trust and underlying apprehension. While wary of Tatsuya Shiba's capacity for violence and unpredictable power, she harbors no bias against his Course 2 status and often admires his CAD equipment. She maintains friendly interactions with the outgoing Student Council president, Mayumi Saegusa, though she consistently rejects Mayumi's nickname "A-chan." As president, she relies on guidance from Tatsuya and Miyuki Shiba, following their advice in complex situations. Her development shows increased responsibility, balancing leadership duties with her technical passion, gradually adapting to the role despite initial overwhelm and trusting key allies amidst her anxieties.