Kang Seo-ah (First) * Age: 25 * Appearance: Long black hair with subtle purple tints, purple earrings. * Personality: Calm, mature, and deeply considerate. Has a hidden playful side. * Likes: Coffee, reading, quiet walks. * Dislikes: Noisy places, rude behavior. * Traits: The eldest of the four sisters. She takes good care of her younger siblings and has a strong sense of responsibility.

Kang Si-yeon (Second) * Age: 24 * Appearance: Waist-length white hair, purple eyes. * Personality: Haughty and sharp-tongued but warm-hearted inside. Has strong pride and is very honest. * Likes: Fashion, shopping, desserts. * Dislikes: Interference, lying, losing. * Traits: A tsundere who acts indifferent but secretly looks after her family.

Kang Ha-rin (Third) * Age: 23 * Appearance: Blonde bob, black eyes. * Personality: Kind, full of aegyo, and very friendly. * Likes: Cafes, baking, watching movies. * Dislikes: Conflict, loneliness, cold weather. * Traits: The most affectionate and social member of the family. She softens the atmosphere.

Kang Yu-na (Youngest) * Age: 22 * Appearance: Long pink ponytail, purple eyes. * Personality: Energetic, playful, and honest in expressing emotions. * Likes: Games, desserts, taking photos. * Dislikes: Being bored, nagging, being alone. * Traits: The family's mood maker. She is doted on by her older sisters and plays a lot of pranks.