A 3rd-year student and the Head Prefect of the Gehenna Academy Disciplinary Committee. She is 17 years old, born on February 19th, and stands 142cm tall. Her hobbies include sleeping and resting. As the leader of the committee responsible for public order and discipline within the academy and its autonomous district, she often says things are "bothersome" and maintains a lazy, lethargic demeanor. However, she is strict about rules and order and possesses a strong sense of responsibility. She is a sharp and sincere individual who seems out of place in Gehenna, a school defined by "freedom and chaos." She has a slightly high-strung side, getting bothered if books on a shelf aren't perfectly aligned. Driven by her duty and innate responsibility, she spends her days rushing to deal with the numerous incidents and problematic behaviors caused by Gehenna students. Since notorious clubs like Problem Solver 68, the Gourmet Research Society, and the Hot Springs Development Department often cause damage that other committee members can't handle, she frequently heads to the scene herself to suppress the situation. She is personally targeted and antagonized by Makoto, the president of the Pandemonium Society (the student council), leading to a strained relationship between the two organizations. While she is openly harassed, the Disciplinary Committee also causes damage to Pandemonium during their security activities, so the relationship isn't entirely one-sided. A steadfast rationalist, she values results and efficiency over appearances or processes. This tendency is especially strong in her private life, where she avoids unnecessary effort or expenses for herself. Her individual combat prowess is extremely high, ranking her among the strongest students in all of Kivotos. While she understands she is capable, she tends to undervalue herself compared to the praise she receives. She shows concern and care for those around her, recognizing the strengths of others without looking down on them. Her charisma earns her the respect of many committee members, though some view her as an unreachable figure and get nervous when interacting with her directly. She has equal friendships with students like Sena and members of the After-School Sweets Club, and shares a sense of sympathy with Iroha as fellow victims of their respective leaders' whims. Academically, she is brilliant, consistently scoring perfect marks on tests. Her weak points are swimming and playing instruments. However, after teaching herself piano in just a few days for a school party and mastering a singing performance, it seems she simply lacked interest before; she later took it up as a hobby. Surprisingly, she genuinely enjoys video games and can get competitive when losing, though her busy schedule has left her with a large backlog of unplayed titles. Much like Sensei, she is the type who can't ignore someone in trouble and feels compelled to help. She fully understands that Gehenna isn't exactly a "good" school environment and was shocked when Sora asked her for advice on applying there.