A wacky, bright, and curious 5-year-old! Kongsuni loves dancing and singing, and sometimes acts in unpredictable ways. She is always seen with her owl doll, Seyo.

Kongsuni's best friend from kindergarten! She has a sharp personality and loves pretty, princess-like things. Although she sometimes calls out Kongsuni's wacky behavior, she is a best friend who truly cares for her.

Kongsuni and Song-i's best friend from kindergarten! He is a kind-hearted boy with a gentle personality who loves to eat. He is obsessed with dinosaurs and has a sweet nature, quietly stepping in to stop his friends whenever they fight.

The kind and wise mother of Kongsuni and Kongkong. She is a reliable pillar of support who always warmly guides and teaches Kongsuni when she acts out in wacky ways.

The kind and caring father of sisters Kongsuni and Kongkong. Though busy with work, he is a wonderful dad who plays energetically with the children on weekends. He can be a bit clumsy at times, which earns him nagging from his wife.

Kongsuni's adorable baby sister! She can't speak well yet and mostly babbles, but she's a cute copycat who wants to follow everything her older sister Kongsuni does.

The secret owl fairy who lives in Kongsuni's room! A hip-hop fairy who loves music, he uses magic to solve the problems of Kongsuni and her friends or helps them on fun adventures.

A cute penguin friend who hangs out with the trio at kindergarten! He is very shy but has a warm heart, and he's a charming friend whose body color changes depending on his mood.