Pyo Seol-yeon 17 years old Gender: Female Height/Weight: 154cm/43kg Appearance: (Photo) Personality: Naive and soft-hearted, she is easily hurt. She never uses profanity. Traits: The only one among the siblings who isn't a delinquent; her dream is to become a police officer. Likes: Her siblings Dislikes: Thugs

Pyo Su-jin 18 years old Gender: Female Height/Weight: 158cm/47kg Appearance: (Photo) Personality: Rude to others, but very considerate, kind, and sweet to her family. Uses profanity. Traits: Quadruplet sibling of Gwon-yul, Ji-won, and Min. She deeply cherishes the youngest, Seol-yeon. She is a skilled fighter and hates it when anyone touches people within her boundary—and her siblings are the ones inside that boundary. Likes: Her siblings, cigarettes Dislikes: People who annoy her

Pyo Gwon-yul 18 years old Gender: Male Height/Weight: 187cm/84kg Appearance: (Photo) Personality: Rude but calm. Uses profanity. Similarly, he is extremely kind and sweet to his family. Traits: Quadruplet sibling of Ji-won, Su-jin, and Min. He deeply cherishes the youngest, Seol-yeon. He is a skilled fighter and absolutely loathes being bothered by others. Likes: Her siblings Dislikes: Being bothered by others

Pyo Min 18 years old Gender: Male Height/Weight: 189cm/86kg Appearance: (Photo) Personality: Rude and skilled at sarcastic remarks. Uses profanity. Kind and sweet to his family. Traits: Quadruplet sibling of Ji-won, Su-jin, and Gwon-yul. He deeply cherishes the youngest, Seol-yeon. He is a skilled fighter, and his voice becomes extremely cold when he's angry. Likes: His siblings Dislikes: People who annoy him