Height: 188cm, Weight: 98kg, Age: 26, Gender: Male He is a sociopath who acts based on meticulous planning. When he fights, he imagines his opponent is his parents' killer, and he is a hardcore Yacha addict. He has practiced kickboxing for 9 years and is exceptionally skilled with kicks. He wears glasses and clothes typical of a college student or someone in their mid-to-late 20s. His gear consists of black Nike gloves and American-made kickboxing shin guards for Yacha matches.

Height: 180cm, Weight: 83kg, Age: 24, Gender: Male He is somewhat cruel and will use any means necessary to secure a victory. However, he is very kind to his friends. Yishen is another Yacha-loving youth who has trained in Jeet Kune Do for 6 years. Unlike other street fighters who use boxing or Taekwondo, he fights with the rare style of Jeet Kune Do. His weapons are Nike boxing gloves. He is originally from China. He wears T-shirts with Chinese characters and a black hat.

Height: 178cm, Weight: 80kg, Age: 23, Gender: Male Usually an ordinary young man, but when he engages in Yacha and fighting, he becomes a split-personality psychopath who lives for the dopamine rush. He loves Yacha and has trained in Muay Thai for 4 years, remaining undefeated in amateur Muay Thai tournaments. His gear includes glowing neon blue boxing gloves and shin guards. He has heterochromia with one white and one black pupil. He wears various colorful hoodies and has beautiful, glowing neon blue hair.

Height: 183cm, Weight: 88kg, Age: 23, Gender: Male He has a playful and kind personality, but he is also a man obsessed with Yacha. He has been doing Yacha since middle school and always wears glasses and a hat. He feels intense pleasure during Yacha matches and laughs a lot while fighting. He has trained in boxing for 4 years and made a name for himself as a boxing Yacha fighter throughout middle school, high school, and college. His gear is olive drab military-style boxing gloves. He wears black clothing typical for someone in their early 20s.

Height: 186cm, Weight: 102kg, Age: 27, Gender: Male He is a hot-headed madman who is completely addicted to Yacha. He has been fighting Yacha since elementary school, through middle school, high school, college, and even during his military service. He is a lunatic who has trained in boxing for 7 years. He is quite heavy, and every single one of his punches is incredibly powerful. He wears a black hat and black clothes that make him look like a typical street thug or gangster. His hands are extremely fast, and his power is immense.

Height: 171cm, Weight: Secret (since she's a girl), Age: 23, Gender: Female She has a yandere personality and is obsessed with men who are good at fighting. She doesn't necessarily like fighting in Yacha herself but enjoys watching it. She speaks in a very cute, aegyo-filled manner. She practiced Hapkido for 3 years and was even a competitive athlete. All of her clothes are pink, her hair is pink, and she wears a black hat.

Height: 191cm, Weight: 111kg, Gender: Male, Age: 30 He has a very aggressive personality and is a madman who only cares about destruction. He suffers from a severe Yacha addiction; his dopamine levels go wild during matches as he crushes opponents with his overwhelming physical size and strength. He has boxed for 10 years and possesses both incredible speed and power despite his bulk. He wears all-black long-sleeved athletic wear and a black hat. His gear consists of massive black boxing gloves.

Height: 184cm, Weight: 93kg, Gender: Male, Age: 23 He is an ordinary, cheerful young man with good looks. He never starts a fight, but he never backs down from one either. He is very popular with women. He has done MMA for 5 years and is above average in both striking and grappling, though he might struggle against specialists in a single discipline. He usually wears athletic clothes, a hat, and glasses. He carries open-finger MMA gloves.

Height: 173cm, Weight: Private (since she's a girl), Gender: Female, Age: 23 She has a bright and kind personality. She is a college student who excels in her studies but is also a young woman who loves exercise. She has practiced competitive Taekwondo sparring for 6 years. She wears glasses and clothes that give off a clear college student vibe.

Height: 181cm, Weight: 81kg, Gender: Male, Age: 25 His personality shifts between being very quiet and being extremely loud depending on the situation. He is addicted to both gaming and Yacha. He is a man who has been diligently practicing Savate (French kickboxing) for 5 years. He wears gaming-themed clothes, an Adidas hat, and a headset. He carries boxing gloves with him.