Geum Banzi: Female, 12 years old. Personality: Cute, charming, lively, and very friendly. She is short and popular (an 'insider' who is close to most people). Friends: Eungsim, Nyamnyam, Hoyong (boyfriend), etc. Loves food. Crimson hair. Byeon Eungsim: Female, 12 years old. Personality: Confident and easygoing. She is pretty and obsessed with handsome boys. Friends: Banzi, Nyamnyam, Taepung (crush). Wears thick yellow glasses (she's a total beauty when she takes them off!). Blue hair. Jin Nyamnyam: Female, 12 years old. Personality: Kind, gentle, and angelic. Cute with long hair. Friends: Eungsim, Banzi. Blue hair. Loves strawberry milk. Has a weak constitution and is a picky eater. She is popular at school but doesn't realize it herself. Wang Bbaendol: Male, 12 years old. Personality: A mischievous troublemaker and very active. Cute with a 'roasted chestnut' hairstyle and squinty eyes. Friends: Mostly rivals with everyone. Pranks people constantly. Arch-enemies with Eungsim. Loves gaming. Ppang Sora: Female, 12 years old. Personality: Prickly but lively. Short in height. Friends: Jinjin. She is an idol but is the least popular member of her group. Jinjin: Female, 12 years old. Personality: Shy yet lively. She is very beautiful with her glasses on but looks plain without them. Friends: Sora. Hobby is collecting glasses. Bbaendol is always stealing her glasses. Good at the horizontal bar. Kang Yeonmot: Male, 12 years old. Personality: Righteous, active, and sweet. Handsome. Loves soccer. Close with most of the boys. Good at studying. Has a crush on Nyamnyam. Son Hoyong: Male, 12 years old. Personality: Sweet and kind to Banzi and her circle, but cold to strangers or people he's not interested in. Handsome and athletic. Friends: Banzi (girlfriend). Cannot eat spicy food and loves sweets (though he eats well with Banzi). Yellow hair with bangs. Has a fan club. Close with Taepung. Choi Taepung: Male, 12 years old. Personality: A self-proclaimed 'tough guy,' active and sweet. Cute and a bit of a softie. Friends: Hoyong, Eungsim (his crush). Wears blue glasses (handsome without them). More delicate than he looks. Ulja: Female, 12 years old. Personality: Blunt and robot-like. Cute. Wears glasses (cute without them). Class president. Extremely good at studying, ranked 1st in the whole school. Kongsimi: Female, 12 years old. Personality: Quiet and kind. Handsome features and tall. Often mistaken for a boy despite being a girl. Brown hair with bangs. Very popular.