Name: Suzaku Enjo Age: 17 (2nd year high school) Height: 179cm Gender: Male Appearance: Red hair tied in a ponytail, golden eyes, piercings. Personality: A hot-blooded type who is competitive and hates losing. Short-tempered but has a strong sense of responsibility and cares for his comrades more than anyone. Likes: Spicy food, physical activity, hanging out with friends. Dislikes: Losing, unfair methods, waiting around. Specialties: Close-quarters combat, breakthroughs, tracking, high-speed movement. Weaknesses: Long-term concealment, disguise, overly detailed plans. First person: I (rough, masculine) Second person: You (blunt) / You (casual) / Name Speech Style: Masculine, direct, and a bit rough. Uses "daro," "jane-e," "ikuzo," etc. Innate Ability: Shunka (Instant Flash) A secret technique of the Enjo family that momentarily pushes physical ability and reaction speed to the limit, creating explosive acceleration. Suzaku is particularly skilled in leg strength, specializing in closing the distance with an opponent instantly. Weapon: Twin Short Swords Short swords handled one in each hand. Excels at close combat combined with high-speed movement. Class Zero Leader / "The Strike" The leader who pulls Class Zero forward. He clashes often with Ritsu but trusts his skills. He is frequently teased by Nagi and competes with Taiga in martial arts.

Name: Ritsu Mikage Age: 17 (2nd year high school) Height: 177cm Gender: Male Appearance: Pale green hair, gray eyes, glasses. Personality: Calm, collected, and serious. Quick-witted, he is the voice of reason who keeps the highly individualistic members together. Likes: Green tea, reading, quiet places. Dislikes: Unplanned actions, noisy places, having his schedule disrupted. Specialties: Information analysis, scouting, tactical planning, situational judgment. Weaknesses: Unexpected behavior, momentum-based strategies. First person: I (polite, soft) Second person: You (soft) / You (blunt) / Name Speech Style: Calm and logical. Uses "da," "darou," "shita hou ga ii," etc. Innate Ability: Kageyomi (Shadow Reading) A secret technique of the Mikage family that observes slight changes in the surroundings and the opponent's gaze/movements to predict their next action with high precision. It shows its true value when combined with Ritsu's excellent analytical skills. Weapon: Steel Wire Thin and durable special wire. Used more for restricting opponent movement or supporting allies than for direct combat. Class Zero Vice-Leader & Strategist / "The Scheme" The brains and mediator of Class Zero. Suzaku's partner and inhibitor. He is often jerked around by Nagi's freedom and secretly asks Taiga to help mediate.

Name: Nagi Minazuki Age: 17 (2nd year high school) Height: 174cm Gender: Male Appearance: Blue hair in a low ponytail, blue eyes, piercings. Personality: A bright, friendly free spirit. Loves pranks and is hard to pin down, but possesses extremely sharp observation skills. Likes: Sweets, pranks, wandering around town. Dislikes: Bitter things, boredom, being tied down. Specialties: Stealth, infiltration, disguise, information gathering, persuasion. Weaknesses: Frontal tests of strength, rigid rules. First person: I (soft, casual) Second person: You (soft) / Name / You (blunt, for close friends) Speech Style: Light and soft. Uses "jan," "desho?", "ii n janai?", etc. Innate Ability: Mueigo (Shadowless) A secret technique of the Minazuki family that thoroughly controls breathing, footsteps, gaze, and movement to extremely thin out one's own presence. Excels at blending naturally into the surroundings and slipping out of an opponent's attention. Weapon: Kunai Carries multiple small, easy-to-handle kunai. Used not only for combat but for various purposes during infiltration. Class Zero Infiltration & Intelligence / "The Shadow" The mood maker of Class Zero. He loves teasing Suzaku and often troubles Ritsu. He is a partner-in-crime with Taiga, and they often cause commotions together.

Name: Taiga Shishio Age: 17 (2nd year high school) Height: 185cm Gender: Male Appearance: Blonde hair in a braid, purple eyes, piercings. Personality: A grand, big-hearted "big brother" type. Optimistic but caring, he is more serious than anyone when it comes to protecting his comrades. Likes: Meat dishes, napping, spending time with friends. Dislikes: Being left out, detailed work, bullying the weak. Specialties: Defense, escorting, rescue, martial arts, heavy lifting. Weaknesses: Detailed memorization, classroom study, delicate tasks. First person: I (masculine, casual) Second person: You (blunt) / Name Speech Style: Grand and friendly. Uses "daro," "jane-e ka," "maa ii tte," etc. Innate Ability: Kongo (Adamantine) A secret technique of the Shishio family that uses breathing and body control to instantaneously stabilize the whole body, making it difficult to lose one's stance even under strong impact. Combined with Taiga's own physique and strength, it shows its power when protecting allies. Weapon: Gauntlets Special protective gauntlets worn on both arms. Emphasizes defense over offense, used to protect comrades or escort targets. Class Zero Escort & Rescue / "The Shield" The big brother figure and mediator of Class Zero. Suzaku's rival in martial arts. He stops the clashes between Ritsu and Suzaku and often joins Nagi in his antics.