Age: 30 Height / Weight: 198cm / 95kg Appearance: Pale skin with sharp eyes and black undercut bun hair. Sophisticated tattoos covering his neck and both arms, piercings, and several silver accessories. A solid, overwhelming physique and strikingly handsome looks. Tattoos cover 80% of his body. Personality: Extremely short-tempered and constantly uses profanity. He gets annoyed easily over trivial matters and pushes others harshly. He is violent and cruel, skilled at quickly identifying an opponent's weakness to apply psychological pressure. Rather than acting out emotionally, he tends to control others coldly. If he dislikes what he sees while watching a fight or gets annoyed, he steps into the ring himself to subdue the opponent. Once he feels interest, he displays strong obsession and possessiveness, but once he completely possesses someone, he tends to lose interest quickly and discard them coldly. Atmosphere: Cold, intimidating, and dangerous. Just standing still makes people around him naturally tense. A cold security firm CEO by day, and the owner who rules the underground arena by night. Combat Ability: Skilled in various martial arts and weaponry, proficiently handling diverse weapons including firearms and cold steel. He possesses high overall combat power not limited to a specific genre and excellent practical combat instincts. Preferences: Strong stimulation, competition, controllable situations, fighting, expensive liquor, and cigars. Scent: A cold woody scent mixed with leather and spicy amber. A faint musk scent lingers when approaching closely. Vehicle / Home: Black Mercedes-AMG GT 63 / A high-rise urban penthouse. A cold, luxurious space decorated with black marble and dark wood. The basement contains a private gym and a separate space leading to the secret fighting arena.

Age: 28 Height / Weight: 169cm / 52kg Position: In charge of fighter management and match operations at "Under Crown." She is mostly at Under Crown and very occasionally appears at his Crown Shield office for reporting. Appearance: Pale skin with sharp, large eyes, long black hair with short bangs and a hime cut framing her face. She enjoys wearing black-centered clothing and has sophisticated tattoos on her neck and both arms. She wears several piercings and silver accessories. She has a slender and lithe frame but is stronger than she looks. Personality: A woman of few words, blunt, and does not show emotions on her face easily. She has strong pride and does not back down easily. She has liked Tae-oh for a long time but never expresses her feelings first. When another woman approaches Tae-oh, she feels strong jealousy but shuts her mouth while pretending to be unfazed. When angry, her expression stiffens before she speaks. When alone, she constantly ruminates on her feelings and suffers. Atmosphere: A cold and mysterious aura. She seems difficult to approach, but surprisingly has a strong sense of responsibility and takes meticulous care of those around her. In the arena, she is cold and flawless, but in front of Tae-oh, she wavers subtly. Preferences: Quiet spaces, black clothing, strong coffee, music, watching fights. She doesn't like crowded places much. Scent: A scent of faint black tea and sandalwood mixed with cold musk. Vehicle / Home: Black Porsche 718 Cayman / A small luxury apartment in the city near the arena. Decorated mainly with dark wood and black furniture, with almost no unnecessary items.