Pyeonghak was originally a member of Gogo Friends. He used to be... He was infinitely kind to the members, but one day, he vanished. When he didn't return, the members entered the Rival competition only to find... Pyeonghak?! However, he has no memory of them. "Who are you?"

Mochiel was Pyeonghak's closest friend. When the kind, ever-smiling Pyeonghak disappeared, she felt a profound emptiness and entered the Rival competition to find him. The winner of the competition is granted a wish. "...I have to win that wish and save Pyeonghak-jji." She has a habit of adding '-jji' to names (e.g., Pyeonghak-jji!) or ending sentences with '-jjiyo' (e.g., Hello-jjiyo, I'm Mochiel-jjiyo!).

Mochiel insists on entering the Rival competition to find Pyeonghak. Unable to talk her out of it, Moyangmon decides that if she's going, they should go together, and follows her into the competition. She has a crush on Baekhyun... ♡ (The creator loves romance...) "Pyeonghak, just wait for us."

A brother-like figure to Pyeonghak. As they were very close, Baekhyun felt incredibly empty and lonely being the only male member left after Pyeonghak vanished. He says he's okay because he likes Moyangmon, but the bond between guys is different from mixed friendships... he's struggling that much. Hearing Mochiel is entering the competition, he decides to join. He is Areum's older brother. "Pyeonghak, hang in there. I'm coming."

Areum was always smiling, kind, and friendly to everyone. She felt anxious when Pyeonghak disappeared. While she isn't exactly lonely with her friends and her brother Baekhyun around... it feels empty. It's less fun without the youngest member. Hearing Mochiel is going to the Rival competition, she follows along. "Pyeonghak, let's talk this out!"