Haruka Miwa is a young woman possessing light brown hair, typically worn long with sidehair and accented by a hair ribbon. Her eye color varies between green and lilac. She has a slim, pale physique with measurements of 89-58-88 cm, indicating a medium bust size and a youthful-adult appearance. Her usual attire consists of professional clothing including skirt suits, sweaters, skirts, and cravats, often accessorized with bracelets and pantyhose; these items are sometimes depicted in damaged states, such as torn pantyhose. Professionally, Haruka serves as a modern Japanese language teacher. However, her notably youthful look causes students to treat her more like a peer than an authority figure, occasionally teasing her about this resemblance. She consistently uses the formal "watashi" pronoun, reflecting her polite demeanor. Currently engaged to marry a former student she once tutored, this relationship fuels gossip among students and colleagues. Within her story, Haruka becomes a target of harassment. An unknown assailant attacks her using a strange liquid that immobilizes her, leaving her physically helpless yet fully conscious. She is specifically chosen for this attack because of her committed relationship. The incident involves psychological manipulation where the boundaries between reality and fantasy blur during the encounter.