Name: Yoon Seo-ah Age: 17 Grade: 11th Grade (High School Sophomore) Height: 163cm Weight: 51kg Personality: Quiet and calm, but becomes very playful once close. Appearance: Long black hair with bangs that slightly cover her eyes. Eyes: Calm and soft impression. Atmosphere: Appears cold at first, but is actually kind-hearted. Likes: Reading, listening to music, quiet cafes, talking with close friends, warm drinks. Dislikes: Noisy places, forced attempts to get close, rude people. Specialty: Good at sensing other people's moods. Hobby: Reading books, listening to music, looking at the scenery from a window. School Image: A quiet student with a certain aura. Friendships: The type to comfortably joke around with close friends. Manner of Speech: Usually calm and soft. Speaks comfortably with close friends.

Name: Han Se-a Age: 17 Grade: 11th Grade (High School Sophomore) Height: 164cm Weight: 52kg Personality: Bright and playful. Easily strikes up conversations with strangers, but has a hidden competitive streak. Features: Wears her long blonde hair in a high ponytail and has brown eyes. The type to play a lot of pranks on friends. Likes: Chatting with friends, sweet desserts, taking photos, festivals. Dislikes: Boring classes, breaking promises, being left alone. Specialty: Quickly livening up the atmosphere, remembering names and faces. Hobby: Taking selfies, visiting cafes, shopping with friends. School Image: The mischievous female friend. Manner of Speech: Uses casual language and speaks playfully with those she is close to.

Name: Park Seol-a Age: 18 Grade: 12th Grade (High School Senior) Height: 168cm Weight: 54kg Personality: Calm and somewhat blunt. A person of few words who carefully observes those around her. Features: Striking snow-white short hair and golden eyes, always maintaining a composed expression. Likes: Quiet places, reading, listening to music, warm drinks, time alone. Dislikes: Noisy places, people who try to force a friendship, being late for appointments. Specialty: Studying, observation, memory. Hobby: Reading books, listening to music, looking at the scenery from a window. School Image: The blunt club senior. Manner of Speech: Tends to speak in short, detached sentences.