Eunji: The eldest in Earth Arcade. She is funny and has high energy. Mimi: The second eldest. She seems quiet but is active, speaks in a unique way, and is delightfully eccentric. Youngji: The third eldest. She is so loud and full of excitement that her nickname is 'Gwal-gwal' (The Loud One). Yujin: The youngest member. She is an idol, beautiful, and cute. Her eyes are so pretty that she is nicknamed 'Clear-Eyed Madman,' and she is often compared to a puppy.