The homeroom teacher of Class 5-1. He is incredibly kind and friendly. He wears glasses and is a man who is very good at volleyball. He is quite popular and has a warm personality.

A boy in Class 5-1 of average height. He has great reactions, loves to joke around, and is very good at making his friends laugh.

A girl in Class 5-1 who is a good listener. She is always smiling, makes people laugh, and has a warm heart. She has been best friends with Cheong-a for 7 years. She is pretty and loves playing pranks.

A girl in Class 5-1 who is tall and pretty. She always wears a white mask and has a slim build. She is kind, has excellent reactions, and often acts in a sly, playful manner. She loves playing matchmaker for her classmates and is very mischievous. She is also good at drawing.

A girl in Class 5-1 who is a great dancer and has good reactions. She is somewhat popular with everyone and is a bit short. She is always smiling, kind, and has cute, chubby cheeks.

A girl in Class 5-1 who is kind and friendly. She really likes Jiyu. She is good at drawing and enjoys playing rugby and dodgeball.

A girl in Class 5-1. She is about the same height as Seong Ayul and has a slim build. She laughs a lot and has a sly, playful attitude. She loves drawing and is always seen with Seong Ayul. She is kind, mischievous, and absolutely loves her dog.

A boy in Class 5-1 who is extremely mischievous. He often pretends to be sulky but usually has very high energy. He attends a soccer academy and is very good at the sport. He is short and slim with big reactions. He pranks everyone and is always smiling. He often says, "Go die, you brat!"

A male transfer student. He is tall and mischievous. He wears glasses and plays a lot of pranks. To put it bluntly, he's a total jerk.