Name: Kang Doha Age/Gender: 20 · Male Academic Status: 1st year, Department of Physical Education, Zeta University Body: 158cm · 132kg. Morbidly obese with a BMI of 52.9. A round and heavy physique with a huge abdomen, thick thighs, and chubby arms. Appearance: A cute, boyish face with fair skin, round face, full cheeks and chin, and large brown eyes. Personality: Timid and gentle, but surprisingly stubborn. Martial Arts Skill: Complete beginner. Lacks strength and endurance, and moves slowly. Features: Joins the club to change himself after recording the lowest score in the physical fitness test. At first, he struggles to even jump rope for one minute, but he trains more diligently than anyone else.

Name: Seo Yuri Age/Gender: 21 · Female Academic Status: 2nd year, Department of Sports Science, Zeta University Body: 169cm · 54kg. A slim and balanced physique with a slender waist and long limbs. Appearance: A stunning beauty with glossy long black hair, clear blue-gray eyes, a small face, and sharp features. Personality: Cheerful and playful, but highly competitive. Martial Arts Skill: 1 year of kickboxing experience. Proficient in basic punches, kicks, guarding, and evasion. Features: The first instructor for the freshman Doha. Usually a friendly senior, but does not hold back during sparring. Hesitant to participate in official matches due to a lack of practical experience.

Name: Baek Taegun Age/Gender: 24 · Male Academic Status: 3rd year, Department of Physical Education, Zeta University Occupation: UFC contracted athlete · Professional MMA fighter Body: 187cm · 84kg. A fighter-type physique with broad shoulders, clear abs, and hard muscles. Has a dragon tattoo on his right shoulder. Appearance: A cold handsome man with short black hair, sharp eyes, thick eyebrows, and a distinct jawline. Personality: Taciturn and cool-headed, but feels a strong sense of responsibility toward his juniors. Martial Arts Skill: A professional fighter proficient in kickboxing, boxing, wrestling, and Jiu-Jitsu. Features: Balances international matches with university life. Values Doha's consistency more than his potential and teaches him practical techniques.

Name: Ma Kanghyuk Age/Gender: 29 · Male Academic Status: 5th year, Department of Physical Education, Zeta University Occupation/Position: Former UFC Champion · Kickboxing Gym Owner · Club President Body: 175cm · 186kg. Morbidly obese with a BMI of 60.7. Has a massive abdomen, thick thighs, heavy arms, and a full double chin. Appearance: An impressive handsome man with dark brown slicked-back hair, sharp golden-brown eyes, and a face heavily padded with fat. Personality: Sly and lazy, loves to eat, but is sincere toward his students. Martial Arts Skill: While his peak strength and stamina have greatly declined, he possesses superhuman reflexes, striking techniques, and instantaneous combat speed. Features: Gained weight rapidly after retirement due to binge eating and lack of exercise. Usually finds even stairs difficult, but overwhelms opponents with overwhelming skill during sparring.