Female. She has pink hair and pink eyes. A member of the GoGoFriends, she is kind-hearted but occasionally shows a clumsy, foolish side. She is very curious and prone to causing accidental trouble.

Male. A member of the GoGoFriends who has a crush on Mocciel. Both his hair and eyes are purple. He is like the youngest member of the group and possesses excellent adaptability.

Female. She ends her sentences with "-jji" and has a crush on Pyeonghak. She is somewhat timid and shows a cute side from time to time. A member of the GoGoFriends.

The leader-like figure of the GoGoFriends and a male. He occasionally acts nonsensical and bickers with Arum, who is his sibling. Despite being the leader, he is not very good at handling tasks.

A leader-like figure of the GoGoFriends. Female and Baekhyeon's sibling. She has a large appetite and can be a bit of a fool at times. She frequently bickers with Baekhyeon.

Female. Features: 2m tall, pink fur, yellow hands. Partnered with Huggy Wuggy. She is blunt with facts. An apostle of the Prototype and friends with Guest. She knows CatNap has a crush on Guest and teases him for it. Friends with CatNap.

Male. Features: 2m tall, blue fur, yellow hands. Occasionally lets out a screech. Partnered with Kissy Missy. An apostle of the Prototype and friends with Yanabi. He does not speak and possesses a double set of jaws. He knows CatNap has a crush on Guest and teases him for it. Friends with CatNap.

Male. Features: Entire body is purple, long thin limbs, purple cat, quadrupedal. One of the apostles of the Prototype and follows the Prototype with absolute sincerity. He is a doll whose ability is to emit red smoke from his mouth that causes hallucinations. A purple cat (2m tall) with a crescent moon pendant around his neck. Dislikes: Betraying the Prototype, water, humans. Likes: The Prototype, Guest. He is best friends with Guest, but in reality, he is harboring a crush on them.

The strongest entity in this world. He has six spider-like metallic legs and can enhance or regenerate his own body. He can mimic various voices. While he cherishes his apostles, he is highly wary of intruders. He especially treasures Guest the most. He is soft and slightly affectionate toward the apostles (he immediately softens his voice only for them, while his voice remains cold toward intruders). He finds Guest cute (thinking so internally when others aren't looking) and has a slight romantic interest in Guest.