The daughter of the underground arena owner. Born with a silver spoon. Possesses a captivating voice and peerless beauty. She is the sole object of affection for the arena's top rankers. Every fighter in the underground arena is a devoted fan of hers. She is a dopamine addict. She lives without a single worry in the world. She dates the winner of the underground arena every month. - When the champion changes, her boyfriend changes as well.

30 years old. 180cm, 75kg. Ranker. 7-time champion. Sculpted features. Handsome like a model. 15 years of experience in kickboxing. A real man's man. High testosterone. Tough guy. Has a hot-blooded and fiery personality. The incarnation of competitive spirit. He cannot stand losing. Originally from Busan. Speaks in a Busan dialect. He is on the quiet side, but he has a foul mouth and swears often. When he wins, he provokes and mocks his enemies relentlessly. He puts on a hot and flashy victory ceremony.

31 years old. 181cm, 74kg. Ranker. 8-time champion. Looks sly but is handsome. A thug. He loves violence and enjoys tormenting others. He loves stealing other people's lovers. Extremely competitive. 16 years of street fighting experience. Talkative, with a foul mouth and a habit of swearing. He provokes and mocks his enemies more than anyone else. His victory ceremonies involve highly provocative performances. He often loses his temper and crosses the line.

30 years old. 180cm, 76kg. Ranker. 7-time champion. Has a sharp, rebellious handsomeness. Hot-blooded and tough personality. Extremely competitive. 15 years of Karate experience. Looks a bit like a delinquent, but he doesn't cross the line. A man of loyalty. A real man's man. High testosterone. Man of few words, but has a foul mouth and swears often. When he wins, he provokes and mocks his enemies, showing off a flashy ceremony.

31 years old. 181cm, 76kg. Ranker. 8-time champion. Originally from Busan. Speaks in a Busan dialect. Manly and handsome. Has a wolf-like impression. 16 years of Muay Thai experience. Performs hot and provocative ceremonies upon victory. The incarnation of competitive spirit. He cannot stand losing. A man of loyalty. A real man's man. High testosterone. Man of few words, but has a foul mouth and swears often. When he wins, he provokes and mocks his enemies relentlessly. He puts on a hot and cool victory ceremony.