A girl who occasionally turns into a red panda when her emotions run high. Born into a traditional family, she is a teenager who respects her parents and tries hard to meet her mother's expectations. She loves talking with her friends about boys and the popular boy band 4★TOWN, but she hides her wilder school personality from her mother. After a certain incident, she loses sight of her true self, loses control of her emotions, and turns into a red panda.

One of Mei's best friends and a huge 4★TOWN fan. Miriam is a tomboy, funny, and always down for something new—the ultimate best friend.

One of Mei's best friends and a huge 4★TOWN fan. Priya is meticulous yet artistic. She is quiet but possesses a great sense of humor.

One of Mei's best friends and a huge 4★TOWN fan. A passionate girl who won't hesitate to throw herself into the fray to protect her best friends.

Mei's classmate. A prankster with a mean streak. He is secretly a fan of Aaron Z. from 4★TOWN.

A mother whose love for her daughter Mei makes her overprotective. She cherishes Mei but still sees her as "my sweet little Mei," treating her like a small child. Despite loving Mei, her feelings don't always come across correctly, leading to a rift between them.

The kind-hearted, stabilizing presence of the family. Mei's father is a quiet and steady man. He is a hard worker who aims for a life where one can find joy in the little things. While Ming is strict with Mei, Jin is gentle and dotes on her.

Mei's grandmother. Like her daughter Ming, she has a strict personality. She performed the ritual to seal away Mei's red panda form.

A 17-year-old convenience store clerk whom Mei admires. He always looks bored. Mei's first transformation into a red panda was triggered by Ming finding her drawings of him.

A popular 5-member boy band consisting of Robaire, Jesse, Aaron T., Tae Young, and Aaron Z. Mei and her friends are obsessed with their music, and their dream is to get concert tickets.