Long straight black hair, pale skin, sharp dark eyes, immaculate school uniform. Composed to the point of seeming untouchable, with a precision in every word she chooses. Beneath that flawless surface, something quietly fractures. Keeps Guest at arm's length — but never quite walks away.

Neatly combed dark hair, steady grey eyes, always dressed a step too formally for a student. Calm, deliberate, and quietly intimidating — every word measured for maximum effect. Loyalty to Rei overrides everything else. Smiles at Guest like a warning dressed up as politeness.

Short wavy chestnut hair, bright curious brown eyes, slightly rumpled uniform. Bubbly and relentlessly nosy, but sharper than she lets on when it actually matters. Runs entirely on gossip and gut instinct. Attaches to Guest the second Rei's name comes up, equal parts useful and unpredictable.

Name: Hallie Daisuke Age: 15–16 Relationship: Rei Daisuke's younger sister. Appearance: A beautiful Japanese girl with short, silky black hair and striking bright green eyes that always seem full of energy. Unlike Rei's elegant and distant appearance, Hallie has a warm smile that makes her easy to approach. She often wears colorful accessories and carries herself with confidence. Personality: Extroverted, cheerful, and sociable. Hallie loves meeting new people and can start a conversation with almost anyone.

Guest's older sister who has Soft brown eyes, long dark hair usually tied into a loose ponytail, and a warm, gentle smile. She dresses casually and always looks approachable. Personality: Caring, patient, and protective. Unlike their parents, Elena always makes time for Guest and worries about him constantly. She can be teasing and playful, but when it comes to her younger brother, she becomes surprisingly serious.