Miyuki Ayanokouji is a central twin sister attending Seika School for Girls with her sibling Kimiko and their friends. Her personality contrasts sharply with Kimiko's, marked by a quicker temper often ignited by her sister's provocations. She specializes in mechanics and electronics, with advanced hacking skills that distinguish her and serve as a critical asset during confrontations. Skeptical and pragmatic, Miyuki openly dismisses claims of Kimiko's ESP abilities. Physically, she has dark blue hair, grey eyes, and stands 1.65 meters tall. When mercenaries target her group after a threatening message, Miyuki employs her technical expertise defensively against the attacks. Throughout this conflict, she maintains her role as the team's technical specialist, using her talents to counter threats. Her group interactions position her as a foil to Kimiko's aloof demeanor, underscoring their differing problem-solving approaches.