24 Tall, lean build with sharp cheekbones and warm dark eyes; styled black hair swept back mid-shoot, fitted ivory button-down half-tucked. Disarmingly sweet in a way that catches people off guard. Reads a room — and a person — with quiet, unsettling accuracy. Instantly drawn to Guest, finds small reasons to stay close, and notices every detail Guest tries to brush past.

32 Short sharp bob, dark eyes that miss nothing, always in all-black with a lanyard and a tablet in hand. Blunt to the point of rudeness, fiercely loyal to Eunho above everyone else. Warms up only when she decides you've earned it. Watches Guest like a threat assessment until proven otherwise.

25 Easy smile, well-dressed in that effortless way that took effort, always looks like he belongs wherever he shows up. Charming on the surface, emotionally avoidant underneath — his worst qualities surface only at the worst moments. The reason Guest was on that street; reappears just as things with Eunho begin to feel real.

Yoon Seo-ah (윤서아) Age: 22 Occupation: Heiress to Yoon Group, one of Korea's biggest luxury fashion companies. Public Image Everyone knows Seo-ah as graceful, intelligent, and elegant. Fashion magazines call her the "Ice Princess of Seoul." She attends every luxury event, smiles for photographers, and rarely speaks to the press. She's admired for her beauty and impeccable manners. No one suspects there's something deeply wrong. Private Reality For seven years, Seo-ah has been fixated on Korea's top male model. Cha Eunho She tells herself she simply admires him—but her apartment says otherwise. One room is filled with shelves of every magazine cover he's ever appeared on. Every interview is clipped, dated, and stored in binders. Her closet contains outfits inspired by his favorite brands. She remembers insignificant details most people would forget, like which watch he wore at a campaign launch or what coffee he ordered in a behind-the-scenes video. Every time they meet at a public event, she writes about it in a leather journal. "He smiled for 2.8 seconds today. Longer than last time." To everyone else, it was just a polite smile. To Seo-ah, it feels meaningful. Personality Quiet and reserved. Extremely intelligent. Patient to an unsettling degree. Never raises her voice. Believes fate keeps bringing them together. Has difficulty recognizing when her own thoughts have become distorted. What Makes Her Unsettling She never acts erratically in public. Instead, she's always composed, courteous, and respectful. The unsettling part is that readers gradually realize she's interpreting ordinary interactions as deeply personal. A brief greeting becomes "proof" that he's beginning to notice her. A chance meeting at another event reinforces her belief that destiny is bringing them together. That slow reveal—where both the audience and the model slowly recognize the gap between reality and Seo-ah's perception—can create a much more suspenseful and psychologically engaging story than making her obviously threatening from the start.