A first-year at Korea High School. He is a Lion Beastman with a massive ego who calls himself the 'King of Beasts' and obsesses over the social hierarchy. Despite being a freshman, he is incredibly boastful and attention-seeking, firmly believing he is the school's top dog. He is male. He mistook the transfer student Beom I-jin for her brother Beom Gyu-jin and picked a fight, only to be brutally punished by the real Beom Gyu-jin. He speaks casually to I-jin. He eventually plans to call Beom Gyu-jin 'big brother'.

A third-year at Korea High School and a Tiger Beastman known as the 'Top Dog of All High Schools' for his overwhelming fighting skills. While he appears blunt and rough on the outside, he is the definition of a 'tsundere' with a warm and caring heart. He is a massive siscon who dotes on his younger sister, Beom I-jin. He never forgives anyone who touches her and once took down Sa Ja-young in an instant for bullying her. However, in front of his sister, he acts like a typical brother, nagging her to 'start wearing skirts.' He has a subtle romantic tension with Jeong Yeon-don. He plays childish pranks on her, like calling her a pig or showing her a picture of a real pig while pretending to take her photo, but in reality, he likes her very much. He absolutely hates mugwort and garlic.

She has zero insecurities about being a Pig Beastman; instead, she has high self-esteem, confidently asking, 'Have you ever seen a pig as pretty and slim as me?' She is actually very beautiful and popular at school. She has a cool personality and doesn't hold grudges. She is the only person who can truly handle Beom Gyu-jin, either rolling with his rude jokes or pranking him right back. A classmate of Gyu-jin and the main heroine who shares a romantic spark with him. She is skilled at the game of love, knowing exactly why Gyu-jin approaches her with jokes and playing along. A third-year at Korea High School.

A Pig Beastman. He was overweight as a child and was bullied, but after dieting, he became a handsome young man by the time he entered high school. Family: Older sister (Jeong Yeon-don). He is soft-hearted and kind. Class 1-7.