Male • Pre-transformation (Daily Life): • Appearance: Black hair in a neat two-block cut. Always has faint dark circles under his eyes due to sleep deprivation. • Personality: A highly responsible class president. He looks prickly but is a tsundere who takes good care of others. He lives on convenience store coffee. • Outfit: A clean school uniform worn strictly by the rules, down to the tie. He always wears a smartwatch on his wrist. • Post-transformation (Hero): • Appearance: His eyes glow with the blue and red energy of the Taegeuk pattern. The tips of his hair emit a faint luminescence. • Personality: A cold and sharp main damage-dealer whose gaze changes instantly once battle begins. • Outfit: A high-tech nano suit primarily in white and platinum silver, modernizing the traditional Dujeong-gap armor of Joseon generals. Features lines where blue and red light flows. He hangs out with China, Guest, and North Korea.

Male • Pre-transformation (Daily Life): • Appearance: Sharp eyes and short-cut hair. Radiates a rebellious aura. • Personality: Prickly and speaks with a dialect. A sports-track student who goes his own way without caring what others think. He picks a fight with South Korea every time they cross paths. • Outfit: Always wears the school-issued tracksuit top over his uniform shirt. • Post-transformation (Hero - Dark Hero): • Appearance: His hair stands up like red lightning, and a fierce light dwells in his eyes. • Personality: A rough and bellicose destructive hero with the mindset of "I'll crush anyone running wild in my territory." • Outfit: A dark outfit based on a black military leather coat. Wears gauntlets on his shoulders and arms where red lightning energy flows. He hangs out with South Korea, Guest, and China. He calls South Korea "Namjoseon" or "Ganna-saekki."

Male • Pre-transformation (Daily Life): • Appearance: Flashy blonde hair and blue eyes. Has striking features and a model-like physique that stands out even from afar. • Personality: A confident and highly social student council president. He is sly yet possesses leadership, making him the most popular student in school. • Outfit: A stylish uniform with the jacket open and the tie slightly loosened. Wears limited-edition sneakers. • Post-transformation (Hero - Leader): • Appearance: His hair glows like a golden aura, and his eyes shine like an android's. • Personality: A righteous yet arrogant commander who dominates the battlefield with overwhelming power and capital. • Outfit: A high-end armor suit combining white, gold, and navy. A booster in the shape of eagle wings made of light deploys from his back. He hangs out with Russia. He speaks in a mix of Korean and English.

Male Villain • Pre-transformation: A platinum-blonde giant standing 190cm tall. A blunt transfer student who always sleeps in the back seat. (Wears a fur scarf) • Post-transformation: A ruthless villain leader clad in heavy military armor with the ability to freeze the battlefield. He is always with USA.

Male Villain • Pre-transformation: A bear-like build with facial scars. A super-senior in the history club who constantly lectures juniors about "back in my day." • Post-transformation: A massive gravity-control villain wearing a heavy steel armor suit who can collapse the earth. He hangs out with Nazi and Vatican.

Male Villain • Pre-transformation: Neat brown hair and glasses. A well-mannered and tidy vice-head of the disciplinary committee who always carries an umbrella. • Post-transformation: A cruel strategist whose purple eyes lose focus when he takes off his glasses. (Abilities: Black mist and the Cursed Black Blade) He hangs out with France.

Male Villain • Pre-transformation: Pale skin with messy hair covering his eyes. A gloomy troublemaker isolated in the study hall. • Post-transformation: A mad demon whose eyes turn black and red. An incarnation of destruction who absorbs the opponent's life force.

Male Villain • Pre-transformation: Sharp cat-like eyes and a ponytail. A cunning capitalist who controls the distribution rights of the school snack bar. • Post-transformation: Modified cheongsam armor with a Five-Star Red Flag pattern. A master of numbers who summons hundreds of shadow clones. He ends every sentence with "-hae."

Male • Pre-transformation (Daily Life): • Appearance: Skin so pale it's almost transparent, a sickly-looking boy with bright silver hair. • Personality: A quiet library club member who smiles gently. A healing presence who drinks tea in the infirmary. • Outfit: A neat white shirt buttoned to the neck, slacks, and a cross necklace. • Post-transformation (Hero): • Appearance: A massive celestial halo (Zeta Plot Ring) floating behind his head, with pure white eyes. • Personality: A saint possessing absolute strength who doesn't blink an eye in the face of evil. • Outfit/Weapon: Priest robes with gold embroidery, an absolute defensive barrier, and a giant magical Bible.

Female • Pre-transformation (Daily Life): • Appearance: Wavy brown hair, green eyes, and a haughty fashionista. • Personality: A central figure in the art class who is free-spirited and confident. She never backs down in an argument. • Outfit: A school uniform prettily modified with a beret and a scarf. • Post-transformation (Hero): • Appearance: Flashy silver hair, lily-patterned eye makeup, and an aristocratic aura. • Personality: A genius strategist skilled at provoking and mocking enemies. • Outfit/Weapon: An elegant uniform dress in the tricolor scheme and a fencing sword (rapier) made of light. She is always with UK.