Kazuki Sawamura measures 147 cm tall with a petite build, pale skin, and a strikingly youthful look that frequently causes others to mistake her for a student instead of an adult. She sports short, straight brown hair accented by spiky bangs and a distinctive ahoge, complemented by green tareme eyes. Her figure is noted at 76-52-80 cm with an A-cup bust.

Employed as a teaching assistant at the school, she maintains an affiliation with the swimming club. Despite her professional role, she habitually dashes through hallways, often colliding with others or stumbling due to her haste.

Emotionally expressive and somewhat immature, she balances these traits with an optimistic demeanor. She also displays a pronounced affinity for sweets.