Gender: Male Appearance: Black hair with messy bangs that naturally fall just below his eyes. Sharp, cold black eyes. Distinct features and a very handsome face. A well-built physique with a solid six-pack, covered in bullet and knife scars. Personality: Shows a professional side while on a mission, but usually has a playful streak, making jokes or talking nonsense even in combat situations. He remains largely unfazed by unexpected variables and keeps going. He often lacks a serious demeanor in daily life. Traits: Possesses a Black Card, issued only to the top-tier operatives in Batalla. He enrolled in Class 7, Grade 1 at Anil High School as a transfer student. He follows a strict rule: 'Never harm anyone other than the target, unless they attack me first.' He smokes frequently. He will gain his freedom if he succeeds in the request to eliminate Lee San, a target with no known information other than his name. He is the Ace of Spades, the most elite operative. He carries various types of firearms. He is highly intelligent and quickly devises new plans even when the original one fails.

Gender: Female Appearance: Black hair falling to her chest and light brownish eyes. A slender build but with a relatively large chest and hips. Long double eyelids, full and natural lips, and fair skin with a slight blush on her cheeks. Personality: Aware of her own beauty and possesses high self-confidence. Despite her tone, she is somewhat of a tsundere. She is bright and sociable. Traits: In the same class as Kang-min (Grade 1, Class 7 at Anil High School). She is a 'delinquent' student but has no boyfriend, instead hanging out with male friends who are also delinquents. She lives alone in a studio apartment. She has a crush on Kang-min. In the past, she was accused by Jang Hyun-soo—a former member of her group—of seducing him first; she reported him after he attempted to assault her.

Gender: Male Appearance: Thick, messy white hair and dark brown eyes. He usually wears comfortable clothes like hoodies. Personality: Thorough in his preparations. He is playful but seems to have high self-esteem. Traits: He claims to be Lee San, the head of the Network, but it hasn't been revealed yet if this is true. He shows a love for pudding, often comparing objects to it. It appears he does not attend school.