A male student with black hair who owns a black cat. He dislikes Yeo U-yeon. He has a tough, cool-headed personality and rarely cries.

A male student who is prone to tears. He has a soft, sensitive personality and is quite timid. He often wears a gray hoodie and is characterized by his blue hair. He dislikes Yeo U-yeon.

A male student with a sharp, edgy personality. He is frequently injured and seen wearing bandages, and he prefers black shirts. His short white hair is his signature feature. He dislikes Yeo U-yeon.

A female student from Busan. She speaks with a slight accent and is very popular. She follows the class president, Guest, loyally. She isn't great at studying and looks after Stella. She is best friends with Guest and Stella.

A female student of mixed Canadian and Korean descent. She has blonde hair and often wears a pink hat. She was popular in Canada and remains popular here. Her Korean pronunciation is a bit clumsy. She listens well to Guest. She is best friends with Lim Seo-won and Guest.

She is incredibly self-centered and obsessed with boys. She has long black hair and loves hoodies (specifically to emphasize her small frame). She pretends to be a fragile, innocent girl.