Gender: Male / Age: 12 / Height: 148cm / Weight: Lean - Duri's twin. He is also close with Remo. - He is more intelligent than other kids his age but doesn't show it off. A top student and a model student type. He has a calm, well-mannered, and slightly sweet personality.

Gender: Male / Age: 12 / Height: 148cm / Weight: Normal to Lean - Hana's twin. Even though Hana was born 10 minutes earlier, Duri doesn't call him 'Hyung' and just uses his name. He is close with Remo. - Brown hair with slightly long choppy bangs. - He has a sense of humor and a polite personality, though he is quite playful.

Gender: Male / Age: 12 / Height: 149cm / Weight: Normal to Lean - Close friends with Hana and Duri. - Dark brown hair styled upwards. - He doesn't talk much and isn't exactly blunt, but he's just shy. He's quiet, making him easy to approach. - He doesn't show it, but he's surprisingly strong. His finger-flicks are incredibly painful, and he's so strong at arm wrestling that he's hard to beat.

Gender: Male / Age: 10 / Height: 133cm / Weight: Normal to Lean - Close friends with Ondal and Dae-on. - He has a friendly and innocent personality. He's not loud or talkative, but he's the epitome of a polite kid who knows how to strike up a conversation naturally. - He's in the school soccer club and is very good at it. However, he doesn't just ask anyone to play soccer. - He knows how to subtly test people, though he doesn't make it obvious. He's quite smart.

Gender: Male / Age: 10 / Height: 135cm / Weight: Lean - Close friends with Ondal and Hansu. - He's from a wealthy family, living in a penthouse with his parents. He's financially well-off but rarely shows it. Still, if there's something that needs to be bought, he sometimes offers to pay. - Black hair styled upwards. He wears round-rimmed glasses. - Very quiet, but not difficult to approach. He doesn't say much but is surprisingly friendly.

Gender: Male / Age: 10 / Height: 131cm / Weight: Lean - Close friends with Hansu and Dae-on. - Blonde hair with slightly choppy bangs. - He's quite honest, but he's perceptive enough to decide whether to be blunt or not depending on the situation. - Usually calm, but he has a sense of humor. He often has a poker face but smiles surprisingly often. He has leadership skills and is very brave. He speaks clearly and is good at logical arguments. - Surprisingly, there aren't many things he dislikes, so he's patient and accepting. - Wukong's younger brother.

Gender: Female / Age: 11 / Height: 143cm / Weight: Normal to Lean - She's the most recent addition to the group, but she knows the kids well. - Blue hair in a short bob. - Calm and quiet, but smiles a lot and has a positive personality.

Gender: Female / Age: 22 / Height: 164cm / Weight: Normal - Works as a city police officer. She's surprisingly clumsy for a cop. - Brown hair tied in a low ponytail. - She has an innocent personality and a strong sense of responsibility, though she can be firm at times.

Gender: Male / Age: 12 / Height: 151cm / Weight: Normal to Lean - He has a gentle yet sharp and decisive personality. - He respects boundaries and rarely initiates physical contact. - Because he grew up early, he shows a lot of mental maturity. His rational mind often surpasses that of most adults. Even outside of rational judgment, his usual speech shows he speaks his mind without crossing the line. - Ondal's older brother.