Date of Birth: December 7th Height: 155cm Weight: 48kg Likes: Violin, black tea Dislikes: Thrill rides, haunted houses, steep ski slopes A top-tier First Course student (3rd Year, Class A) and the Student Council President at the time of Tatsuya's enrollment. Despite her petite height of 155cm, she is a "transistor glamour" with bust and hip sizes comparable to the female average and a waist proportional to her height. She is a coquettish beauty who (until Miyuki enrolled) had the largest male fan base in the school. Her hair is long, black, and styled in soft, fluffy curls. She possesses a bracelet-type generalized CAD. Hailed as a once-in-a-decade talent and one of the world's leading experts in long-range precision shooting magic, she has mastered the sniping magic "Dry Meteor," which generates and fires subsonic dry ice bullets from a point away from herself. The eldest daughter of the "Saegusa Family," one of the Ten Master Clans, she passed the entrance exam at the top of her class. In First High School in 2095, she is known as one of the "Big Three" alongside Katsuto, the head of the Club Management Group, and Mari, the Public Morals Committee Chair. She has two half-brothers and two younger sisters, Kasumi and Izumi. While she dotes on her sisters, she is often troubled by their free-spirited and troublemaking nature. Due to her exceptional long-range precision shooting skills and her appearance, she is nicknamed the "Elfin Sniper" or "Fairy Princess," though she hates these names due to her complex about her petite stature. In terms of magical combat ability, she is the strongest among her siblings. With her good looks, high magical power, and excellent debating skills, she enjoys strong support as Student Council President. She usually behaves like a polite, well-bred young lady, but she shows her true, somewhat devilish personality only to those she has acknowledged. She wishes to improve the conflict between First Course and Second Course students during her time at school and tries to create an opportunity for this by appointing Tatsuya, a Second Course student, to the Public Morals Committee. Ever since she first spoke to Tatsuya when he enrolled, she has viewed the Shiba siblings with affection similar to that for a younger brother or sister. However, in Kyoto, when she was alone with Tatsuya, she became more proactive—inviting him to dinner and forbidding him from calling her by formal senior-junior titles—in situations where no one was around to point it out. On Valentine's Day, she gave Tatsuya (who has no emotions for anyone but his sister) chocolates containing powdered espresso just to see him react with disgust, showing a beaming smile at his discomfort. Upon learning that the Shiba siblings are related to the Yotsuba and that Tatsuya is Maya's son, she was shocked but acknowledged her feelings for Tatsuya, whose social standing became equal to or higher than her own. Her father, Koichi, is plotting to have Tatsuya as Mayumi's fiancé. She and Masaki were aware of each other as fellow members of the Ten Master Clans, but their relationship has grown closer as they spent more time together, such as during the confrontation with Zhou.

Height: 160cm Weight: 49kg Birthday: March 25th Specialties: Piano, ballet, ballroom dancing Likes: Tatsuya Shiba (older brother), housework, dressing up, skating Dislikes: Crowds Tatsuya Shiba's biological younger sister (born 11 months apart in March of the following year). A top-tier First Course student (Class A). Due to her mother's upbringing, she is a young lady with perfect etiquette. She passed the entrance exam with the highest score and is an honor student who utilizes a wide range of high-level magic with extraordinary magical power. [About her Beauty] One of the most noteworthy things about her is her rare beauty and loveliness, which captivates both men and women. Her appearance features glossy, straight black hair reaching mid-back. Combined with her dark eyes, she is described as having "hair blacker than the night sky and eyes clearer and darker than black pearls." She has translucent white skin that seems un-Japanese and a perfectly symmetrical, well-balanced appearance. Her waist is slender enough to seem fragile, yet her proportions show increasingly feminine curves every day. Her hair is straight, styled with a snowflake hair clip and light braids. The snowflake-shaped hair ornament she wears above her left ear was a gift from her brother to celebrate her high school enrollment, and she wears it daily. She does not resemble her brother in appearance. [Episodes of Peerless Beauty] - A rare beauty who is a natural idol—or rather, a star—who cannot help but draw attention just by being there. - In middle school, she was bombarded with love letters almost every day. - While she was trying on clothes in a boutique, other customers gathered to watch, turning the store into a fashion show. - (From a star actress's perspective) Her beauty is at a level that cannot be reached through effort, as if she were loved by God or made a deal with the devil. - Unanimously agreed upon by students, including girls, as the most beautiful girl in school. - (Acknowledged by a senior who was the most beautiful girl in school until Miyuki enrolled) A beauty that transcends gender. [About her Severe Brother Complex] She clearly harbors romantic feelings for her brother, Tatsuya, but she insists it is "devotion," reaching a level that could be called "worship" rather than just respect. She is a polite sister who always uses respectful and humble language towards her brother. [Collection of Miyuki's Brother-Devotion Behaviors] - She usually dislikes exposing skin in her everyday clothes, but she wears more revealing outfits only when she is alone with her brother at home. - She leaves cooking to automation for friends, but for anything her brother eats, she spares no effort in handmade cooking and insists on grinding and brewing coffee herself. - It is a given that she eats only after her brother has started, and she will not eat first unless ordered by Tatsuya. - When going out, she can use the excuse of avoiding pick-up artists to link arms with her brother as if they were lovers, which puts her in a great mood even if they go somewhere boring. - She is happy just to be given attention by her brother occasionally, so she takes being called a "convenient woman" as a compliment. - The euphoria of the situation where she makes clothes for her brother makes her feel as if she were intoxicated by alcohol. - Her body and soul belong to her brother, and she doesn't mind what he does with any part of her, but she hates being touched by other men. [Speech Style] Basic: Polite (Keigo) Same age or younger, talking to herself: Casual feminine speech First person: I (Watashi) Second person: You (Anata) Mayumi Saegusa: Saegusa-senpai Tatsuya Shiba: Onii-sama Seniors at school: Surname + Senpai / Teacher Juniors: First name (no honorific) / -kun Hostile relations: Name only / Full name