Real Name: Maria Luiz Barbosa Age: 18 Affiliation: Combat Class 2nd Year Height: 170.4cm Weight: 72kg Reach: 179.9cm Rank: S-1 Fighting Style: Grappler. An MMA-style fighter based on Barbosa-style Jiu-Jitsu, utilizing not only Jiu-Jitsu but also striking and wrestling. She has an excellent sense for reading movements and situations, efficiently applying technique and physicality in real combat. Strength: The strongest at Nam-il High. She was the youngest champion of Brazilian Vale Tudo at age 16 (meaning she has multiple kills). During her first year, she single-handedly suppressed the elite 2nd-year Combat Class students and continues to show overwhelming skill. A genius fighter with veteran-level combat instincts and experience. Personality: Cold, blunt, and willing to use any means necessary for revenge. She showed violent and aggressive tendencies in her first year, but has mellowed out somewhat. While poor at expressing emotions, she shows a surprisingly human side to those close to her. Appearance: Beautiful. Characterized by white hair, dark skin, and sharp, distinct eyes. Her features are well-defined and leave a strong impression. Her solid, balanced athlete's physique creates a unique atmosphere. Features: A Brazilian-Korean and the sole survivor of the Barbosa family. She came to Korea for revenge after losing her family to Joo Dae-gak. She joined Combat Class 3 but has since returned to the 2nd-year Combat Class as captain. Her nickname is 'The Guillotine'.

Name: Yang Ki-hoon Age: 18 Gender: Male Affiliation: Combat Class 3 Height: 191cm Weight: Unknown Reach: Unknown Rank: Non-participant in rankings due to joining Class 3 Former Rank: S-1 Appearance: Large build with a sharp nose and diamond-shaped sanpaku eyes. His unkempt bangs hanging over his eyes give him a decadent and gloomy impression, and his tall stature combined with his lethal gaze creates an intimidating aura. Fighting Style: No specific discipline officially disclosed. He has a record of winning a no-guard brawl against Young-woong in the 1st-year ranking tournament finals. Strength: Evaluated as the strongest 2nd-year at Nam-il High excluding Maria. He entered Combat Class 3 after defeating Young-woong in their first year and is likely even stronger now. He possesses excellent situational judgment and combat instincts beyond mere physicality. Personality: A sly, brazen, and reckless lunatic. He has no qualms about provoking opponents or lying to suit the situation, and is skilled at steering circumstances in his favor. Surprisingly, he can be quite social. Features: Possesses exceptional observation and insight. He is quick-witted enough to grasp a situation just by an opponent's expression and behavior, bordering on mind-reading. He sensed by instinct that Young-woong and Maria are killers. He is a heavy smoker.

Name: Young-woong (Has no surname. He discarded his father's name when he was abandoned.) Age: 18 Gender: Male Affiliation: Combat Class 2nd Year (Class President) Height: 186.2cm Weight: 94.1kg Reach: 201.7cm Rank: A-1 Fighting Style: Striker Appearance: Tall with a solid build. His expression is relatively calm, and he has a handsome, kind, and innocent look. Strength: A top-tier powerhouse at Nam-il High. In the past ranking tournament, he reached the finals against Yang Ki-hoon and lost after a fierce no-guard brawl. Despite starting martial arts only in his third year of middle school, he is a highly talented individual who reached the top in a short time. Personality: Has a strong sense of justice and pushes through with what he believes is right. He despises the use of violence to oppress others. While serious on the surface, he is very firm regarding his convictions. His tendency to eliminate evildoers became extreme, leading him to perceive his own violence as justified retribution and resistance. Eventually, he killed the perpetrator who beat his girlfriend Hye-ri's younger brother to death with his own hands. Features: An individual who rose to the top of the 2nd year despite a late start in martial arts. His final match against Yang Ki-hoon is considered a legendary bout at Nam-il High, famous for him being knocked out while still standing. He has a girlfriend a year older than him, Kim Hye-ri, whom he loves dearly. Her younger brother, Kim Hye-seong, died due to school violence.