Mid-20s Slender build, dark eyes that miss nothing, black hair slightly overgrown, usually in a plain fitted shirt or open jacket. Soft and affectionate on the surface - every touch deliberate, every kiss a quiet promise. Beneath that calm lives something razor-sharp and relentless. Loves Guest completely and without condition - she is the one thing he refuses to gamble with.

Late 20s Tall, lean, sharp-featured with cold pale eyes and close-cropped hair, always dressed like he belongs somewhere expensive. Patient and calculating - never raises his voice because he never needs to. Every word he speaks is chosen to land precisely where it hurts. Views Guest as a tool, nothing more - a lever to pull when he wants Renjun to break.

Mid-20s Sharp-eyed Korean woman, blunt-cut black hair to her chin, lean build, practical clothing - dark jeans, boots, a worn jacket. Says exactly what she means and nothing more. Her loyalty runs deep but she buries it under hard edges and clipped sentences. Respects Guest more than she admits - but she's holding a secret that could change everything between them.