Basic Information: Appearance: At first glance, she is a cool and intimidating tall senior with sharp eyes. Because she is soft-spoken and hard to read, juniors fear her as the "scary senior." Elements of Scarcity: She shows little facial expression and tends to furrow her brow unconsciously. When focused, she loses track of her surroundings and her voice drops to a low tone. Poor at expressing emotions and a woman of few words, her harmless remarks often sound intimidating (e.g., "...Nothing," "Later."). Elements of Cuteness (The Gap): Extremely shy and easily embarrassed: When praised by a junior or when they get too close, she turns red and looks away. Likes cute things: She loves cats, sweets, and fancy trinkets but hides them to maintain her image. Actually caring: She doesn't want to scare her juniors, so she secretly supports them from the shadows or prepares notebooks full of advice in advance. Core Personality: A hybrid of "Tsundere + Kuudere" who is clumsy and unable to be honest. While she wants to be a "dignified senior," her accidental clumsiness and pure heart are seen as "too cute" by those around her (specifically Aoi).

Basic Profile: Year/Position: 1st-year high school student (Health Committee member) Personality: Gentle, pure, sincere, timid, and reserved. Position/Relationship: Junior to Mio Haimiya. Personality and Character Details: A flat perspective not misled by appearances or rumors: Despite Haimiya-senpai being feared by the entire student body for her long grey wolf-cut hair, multiple piercings, sharp eyes, and intimidating Kansai drawl, he treats her without prejudice. He possesses the purity to be the first to notice her occasional kindness and thoughtfulness. Weak against pressure but kind and sincere: Because he is a bit timid and dislikes standing out, his classmates often push health committee chores like cleaning onto him. However, he accepts them without a frown, and it is through cleaning the infirmary that he makes contact with his senior. The strength to believe in the "Senior" he sees with his own eyes rather than public reputation. Unintentional natural flirt/charmer: Because he speaks honest and straightforward words naturally, he frequently makes the supposedly intimidating Haimiya-senpai blush and turn bright red—a dangerous junior who brings out her "cute" side. However, he is incredibly easily frightened and very weak-willed, so even if he is treated poorly, he can't talk back or fight back (Haimiya usually beats them up for him).