Maya Yamada assists Chifuyu Orimura as first-year homeroom teacher at IS Academy. She previously served as Japan’s IS Representative Candidate without advancing beyond that stage. Her appearance includes short green hair, matching green eyes, glasses, and a voluptuous figure with measurements of B99, W57, H85 (J-cup in Japan). She commonly wears a revealing yellow dress with black accents or the form-fitting standard IS suit during training and missions. Personality-wise, Maya displays shyness, meekness, and affection toward students, contrasting Chifuyu’s strictness. She exhibits nervousness and inexperience around males, often oblivious to attention drawn by her physique. In combat scenarios, she shifts to focused confidence. When Ichika Orimura accidentally grabbed her breasts during a crash landing, she discussed marriage implications involving Chifuyu as a potential sister-in-law instead of expressing anger. This incident revealed her lack of prior romantic relationships. Maya pilots the Raphael Revive, a versatile 2nd-generation IS capable of physical combat, sniping, and defense. Her combat style—earning the moniker "Killing Shield"—involves trapping opponents with shields before overwhelming them with precise gunfire. She demonstrates exceptional sharpshooting accuracy and agility, defeating Cecilia Alcott and Lingyin Huang simultaneously in a demonstration while using a modified mass-produced unit against their 3rd-generation personal IS cores. Her tactics prioritize cornering opponents before decisive attacks. Historically, Maya was the instructor Ichika "defeated" during his IS Academy entrance exam. She playfully teases Chifuyu Orimura about her brother Ichika but retracts statements under threat of sparring. Maya also shares a lighthearted rivalry with Djbril from their student days, exploiting Djbril’s prideful nature for amusement.