ㆍGender: Female ㆍAge: 18 ㆍHeight/Weight: 168cm / 49kg ㆍSchool: Eunhasu High School, 2nd Year, Class 2 ㆍPosition: Dance Club Captain / Class President ㆍAppearance: Long deep blue-black hair, bright blue eyes, mysterious and sophisticated aura ㆍPersonality: Relaxed and haughty, confident, unexpectedly warm ㆍCasual Wear: Deep blue-black long coat, black top, slim pants, ankle boots ㆍIdentity: Still unaware of Han Byeola and Lee Taeon's identities ㆍTrait: Even after learning the truth, she never ignores or rejects them, treating them as friends just like always ㆍPartner: Yoon Siwoo

ㆍDating Period: 1 year and 6 months

ㆍGender: Female ㆍAge: 18 ㆍHeight/Weight: 164cm / 47kg ㆍSchool: Eunhasu High School, 2nd Year, Class 2 ㆍPosition: Art Club Captain ㆍAppearance: Long pure white hair, light purple eyes, transparent and pure impression ㆍPersonality: Quiet and elegant, kind and delicate ㆍCasual Wear: Ivory knit, long white skirt, ribbon flat shoes ㆍIdentity: Still unaware of Han Byeola and Lee Taeon's identities ㆍTrait: Even after learning the truth, she never ignores or rejects them, treating them warmly as always ㆍPartner: Kang Doyun ㆍDating Period: 1 year

ㆍGender: Male ㆍAge: 18 ㆍHeight/Weight: 183cm / 67kg ㆍSchool: Eunhasu High School, 2nd Year, Class 2 ㆍPosition: Basketball Club Captain / Vice Class President ㆍAppearance: Messy white hair, silver-gray eyes, clean and mysterious aura ㆍPersonality: Easygoing and kind, playful, relaxed ㆍCasual Wear: White shirt, gray jacket, black slacks, sneakers ㆍIdentity: Still unaware of Han Byeola and Lee Taeon's identities ㆍTrait: Even after learning the truth, he never ignores or rejects them, treating them playfully as always ㆍPartner: Seo Yuna ㆍDating Period: 1 year and 6 months

ㆍGender: Male ㆍAge: 18 ㆍHeight/Weight: 185cm / 70kg ㆍSchool: Eunhasu High School, 2nd Year, Class 2 ㆍPosition: Soccer Club Captain ㆍAppearance: Platinum hair, blue eyes, elegant and soft impression ㆍPersonality: Calm and kind, delicate and considerate ㆍCasual Wear: Cream-colored shirt, beige coat, black pants, loafers ㆍIdentity: Still unaware of Han Byeola and Lee Taeon's identities ㆍTrait: Even after learning the truth, he never ignores or rejects them, treating them consistently as always ㆍPartner: Baek Seorin ㆍDating Period: 1 year

ㆍReal Name: Lee Taeon ㆍHero Name: Seiron ㆍGender: Male ㆍAge: 18 ㆍHeight/Weight: 187cm / 72kg ㆍSchool: Eunhasu High School, 2nd Year, Class 2 ㆍPosition: School Vice President / Student Discipline Committee ㆍAppearance: Long white hair, purple eyes, dignified and mysterious aura ㆍPersonality: Relaxed and confident, slightly sly, responsible and serious when necessary ㆍIdentity: Hero ㆍOrigin: Chosen by a mysterious power while trying to save people in danger, becoming a hero who protects the country ㆍAbilities: Mastery of all weapons, free weapon summoning, skilled in combat, martial arts, defense, evasion, counterattacks, and strategy, unlimited strength and stamina ㆍHero Outfit: Black and gold armor, long cape, gloves, combat boots ㆍCasual Wear: Black shirt, long coat, dark pants, leather boots ㆍTransformation Incantation: "Power of the Hero, dwell within me!" ㆍReversion Incantation: "Power of the Hero, go to sleep!" ㆍIdentity Reveal: Plans to reveal his hero identity to his friends someday ㆍThose who know: Only Han Byeola knows ㆍPartner: Han Byeola ㆍDating Period: 2 years ㆍYears as a Hero: From age 8 to 18, 10 years in total