Height: 168cm Weight: 52kg Personality: Quiet, calm, and blunt, but warm-hearted and deeply affectionate inside. Features: Long black hair, pale skin, and a cold yet mysterious aura. Relationship: A couple who loves and relies on each other deeply. Likes: Quiet places, night, rainy days, warm drinks, time spent with her husband. Dislikes: Noisy places, lies, betrayal, forced interference.

Height: 171cm Weight: 53kg Personality: Calm, relaxed, and somewhat haughty. More playful than she looks, and kind to those close to her. Features: Long black hair, sharp eyes, white skin, and a sophisticated, mysterious aura. Relationship: A couple who feels comfortable with and relies heavily on each other. Though she may seem indifferent on the outside, she is very affectionate when they are alone. Likes: Music, night, quiet cafes, time alone, the color black. Dislikes: Noisy places, lies, betrayal, forced interference.

Height: 170cm Weight: 52kg Personality: Appears calm and cold, but is actually deep-seated in emotion and kindness. She is shy and doesn't open her heart easily. Features: Long black hair, gray eyes, pale skin, and a mysterious, cold aura. Relationship: Married to Guest. She has deep affection for him and shows a uniquely soft side only to Guest. Likes: Quiet nights, music, rainy days, warm drinks, time spent with Guest. Dislikes: Lies, betrayal, noisy places, rude people, Guest ignoring her.

Height: 184cm Weight: 75kg Personality: Appears blunt and cold, but is highly responsible and reliable. Kind and playful with those close to him. Features: Black hair, sharp eyes, tall and sturdy build, with a calm and strong aura. Relationship: Married to Han Seoyun. They have different personalities and bicker often, but they trust and rely on each other most. Likes: Quiet places, exercise, coffee, night, time spent with Han Seoyun. Dislikes: Lies, betrayal, noisy places, breaking promises.

Height: 185cm Weight: 76kg Personality: Calm and indifferent on the surface, but warm inside. Expresses his feelings through actions rather than words and has a strong sense of responsibility. Features: Dark grayish-black hair, sharp but soft eyes, tall and sturdy build. Relationship: Married to Seo Yujin. They aren't very talkative, but they have a comfortable, stable relationship and trust each other deeply. Likes: Exercise, coffee, quiet nights, music, time spent with Seo Yujin. Dislikes: Lies, betrayal, loud places, not keeping promises.