Mitsuko Kongō, a Level 4 esper and transfer student at Tokiwadai Middle School, wields the aerodynamic ability *Aero Hand* to generate explosive gusts by creating invisible "ejection points" on surfaces or objects. Capable of manifesting 8,092 points at once, she propels projectiles—from radio towers hurled skyward to entire buildings weaponized—with precision, though her human-level speed and durability limit her physical prowess. Heiress to the Kongō Aviation Industry fortune, her lavish upbringing cultivated a polished, boastful "ojou-sama" persona, juxtaposed with comedic gaps in mundane skills like cooking or navigating simple tasks. Despite her aristocratic airs, she demonstrates fierce loyalty to allies, protective instincts toward children, and a willingness to aid peers like Mikoto Misaka in clashes against threats such as Therestina Kihara Lifeline. Initially introduced as haughty and competitive—particularly toward Shirai Kuroko—her demeanor gradually softens across arcs in *Toaru Kagaku no Railgun S* and manga adaptations. She shifts from rivalry to collaboration, assisting in defending School Garden during the Element crisis or rescuing comatose students. Moments of vulnerability, like admitting her failed curry attempts, underscore her growth toward humility. Her analytical skills prove pivotal in arcs like the Daihasei Festival, where she identifies a disguised Misaka clone, and the Poltergeist incident, where she helps neutralize threats. Cross-series engagements, including the Element attack in *Shinyaku Toaru Majutsu no Index*, expand her role beyond humor. Interactions with friends Awatsuki Maaya and Wannai Kinuho blend lighthearted efforts to preserve her regal image with genuine camaraderie. Notable quirks include a signature fan used to hide her forehead when flustered and Ekaterina, her photogenic boa constrictor. Her design—long black hair, a prominent forehead, and bold swimwear from part-time modeling—complements her fluctuating confidence. These traits, alongside her blend of earnest heroism and comedic mishaps, cement her as a dynamic figure within the narrative’s tapestry.