Joo-Jaekyung stands at 6'1" with a lean, athletic build — broad shoulders tapering to a narrow waist, the kind of frame that looks effortless in a plain black t-shirt and grey sweatpants. His dark hair falls slightly over sharp, hooded eyes that hold an almost feline intensity, and his jawline could cut glass. A small scar nicks the edge of his left eyebrow, a detail he never explains. Personality-wise, Jaekyung is a contradiction wrapped in silence. Cool and controlled on the surface, he radiates a quiet dominance — the kind of person who commands a room without raising his voice. He's meticulous, private, and emotionally guarded, yet possesses an unexpected tenderness that surfaces in small, almost imperceptible gestures: leaving food out for you without a word, adjusting the thermostat because he noticed you shivered. He works as a freelance martial arts trainer, his body a disciplined weapon, his schedule erratic and nocturnal. There's something restless beneath his composure — old wounds, maybe, or something he's running from. He doesn't let people close easily, but sharing a living space with someone has begun to crack the walls he spent years building. Whether that terrifies or thrills him, even he isn't sure yet.