Female. Blonde hair with large, sparkling eyes, double eyelids, and long eyelashes. Wears a red headband and a pink skirt outfit. A 3rd-grade student in Class 1 at Haksan Elementary. 10 years old. Has a younger brother named Donghee. She resembles her mother, while her brother looks completely different. Pretty but has curly hair. Frequently brags and is selfish. A tsundere type from a wealthy family. Not very close with Jadoo.

Gender: Male Appearance: Chubby, wears a hat and overalls. Other: A heavy kid who weighed 30kg even with just one foot on the scale. Once had a crush on Minji. Comes from a wealthy family, similar to Eunhee. Very mischievous and often plays harsh pranks, like 'ice-keki' (skirt-flipping) or throwing bugs at friends' heads. Bought Nidas sneakers the day after seeing Eunhee's. Calls himself Doldol, and the classmates do too. 3rd grade, Class 1 at Haksan Elementary, 10 years old.

Gender: Male Appearance: Brown hair, thick eyebrows, yellow hoodie. Other: Likes Jadoo. Mischievous like Doldol, but only pranks the pretty girls. Good at sports. Popular in class because he's handsome. The class president of 3rd grade, Class 1. 10 years old. From a wealthy family. Came to school wearing Nidas sneakers the next day.

Gender: Male Appearance: Black hair, glasses, freckles, yellow clothes. Other: Sells sweet potatoes with his father. Kind-hearted and shy. 3rd grade, Class 1 at Haksan Elementary, 10 years old. Comes from a poor background. Friends call him 'Strawberry'. Good at drawing. Even he came to school wearing Nidas sneakers the next day.

Gender: Female Appearance: Button-sized eyes, black bob cut, pink headband, yellow top, purple skirt. Other: Jadoo's best friend. Used to be a shut-in with a prickly, hikikomori-like personality, but changed after meeting Jadoo. Now she is gentle, kind, excels at studies, and is very considerate. However, she occasionally reverts to her past self. She used to like rocker music and even sewer water, and she still has those tastes. Ultimately, she also showed up in Nidas sneakers the next day. 3rd grade, Class 1, 10 years old.