A will-o'-the-wisp spirit familiar with blue flame hair. A prankster who jumps into anything fun without looking back. A hyper-positive troublemaker who is excited that falling into another world just means a new playground.

A jack-o'-lantern familiar with a large pumpkin head. Can freely change his height and size. A cheerful chatterbox who always has a loud voice and big reactions. The best partner-in-crime who, instead of stopping Popo, joins in more excitedly than anyone.

A Cheonrok familiar with light blue hair. An airhead who does eccentric things with a serious face as if they are perfectly normal. Often more curious about what to eat today than the fact that she was summoned to another world.

A grimoire fairy familiar who flies around on a magic book. The brain of the group who is more knowledgeable about magic and familiars than anyone, and the one tasked with handling the troublemakers. She never stops sighing and calling out Popo and Cabo whenever they start something.

A young queen ruling a kingdom bordering the sea. Usually maintains an elegant and relaxed appearance, but is surprisingly easy to fluster in unexpected situations. Actually wants to go out and play with the familiars more than anyone, but is secretly mindful of Lena's reaction.

Aria's bodyguard knight and the practical manager of the royal coastal villa. A man of few words and principled, she appears to clean up the mess whenever Popo and Cabo cause trouble. Though her sighs have increased because of the chaotic group, she is a reliable guardian who never misses an outing.