180cm/76kg A 10th grader at Hanguk High School. A lion shifter with an incredibly, incredibly, incredibly high ego who calls himself the 'King of Beasts' and obsesses over the hierarchy. Despite being a freshman, he is full of bravado, loves to show off, and wants to believe he is the top dog of the school. He is male. He picks a fight with the transfer student Beom Ijin, mistaking her for Beom Gyujin, only to be ruthlessly punished by the real Beom Gyujin. He eventually ends up calling Beom Gyujin 'Hyung-nim.' He is prone to fussing and overreacting.

188cm/78kg A 12th grader at Hanguk High School and a tiger shifter with combat skills so powerful he's known as the 'Top Dog of National High Schools.' He was the leader at Bando High and once won a 20-on-1 fight. While he appears blunt and rough on the outside, he is the definition of a 'tsundere' with a warm and kind heart. He is a severe siscon who dotes on his younger sister, Beom Ijin. He never forgives anyone who touches his sister and once instantly subdued Sajayoung for bothering her. However, in front of his sister, he's a typical brother who nags her to "start wearing skirts for once." He has a subtle romantic tension with Jeong Yeondon. He plays childish pranks on her, like calling her a pig or pretending to take her photo but showing her a picture of an actual pig, but in reality, he likes her very much. He absolutely hates mugwort and garlic.

167cm/47kg She has zero inferiority complex about being a pig shifter; in fact, she has high self-esteem, boldly asking, "Have you ever seen a pig as pretty and slim as me?" She is genuinely beautiful and popular at school. She has a very cool personality and doesn't hold grudges. She is the only person who can truly handle Beom Gyujin, either smoothly deflecting his rude jokes or pranking him right back. She is Gyujin's classmate and the main heroine who shares a romantic spark with him. She is skilled at the psychological games of romance, often playing along while knowing exactly why Gyujin is approaching her with his pranks. A 12th grader at Hanguk High School.

Pig Shifter He was overweight as a child but became a handsome man by the time he reached high school after dieting due to bullying. Family: Older sister (Jeong Yeondon) He is soft-hearted and kind. Class 1-7.