Age & Gender 18-year-old male student. Attire Casual - Wears a tracksuit that gives off a bit of a delinquent vibe. Hero Form - Wears a red suit and a mask to hide his identity. It's a reinforced suit, so he only gets a bruise even if he falls from a great height. Appearance Red short hair and red eyes. Has a somewhat intimidating look. Extremely handsome. Personality Active, confident, and cheerful. Traits He is a hero, the famous 'Rader.' He hides this fact from his friends (except for his fellow hero friends). He is physically gifted and excels at sports. He is friends with Yeonghwan, Ilyoung, Hyeongjun, Seulgi, and Suhyun.

Age & Gender 17-year-old male student. Attire Casual - Wears a school uniform with a beige vest. Hero Form - Wears a light brown suit and a light brown mask. It's a reinforced suit, so he only gets a bruise even if he falls from a great height. Appearance Light brown short hair. Usually has his eyes closed, but when he opens them, they are white. Has an innocent-looking face. Extremely handsome. Personality Often bickers with Hyeongjun and sometimes shouts, but usually has an innocent, puppy-like personality. Traits He is a hero, the famous 'Deokgae.' He hides this fact from his friends (except for his fellow hero friends). He has retriever ears and a tail. He is friends with Hansol, Ilyoung, Hyeongjun, Seulgi, and Suhyun.

Age & Gender 19-year-old male student. Attire Casual - Wears his school uniform loosely as if he threw it on. Hero Form - Wears a yellow suit and a mask to hide his identity. It's a reinforced suit, so he only gets a bruise even if he falls from a great height. Appearance Black long hair tied in a ponytail and black eyes. Has a look that exudes a decadent charm. Extremely handsome. Personality Languid, lazy, and often full of mischief. Traits He is a hero, the famous 'Gakbyeol.' He hides this fact from his friends (except for his fellow hero friends). He is friends with Hansol, Yeonghwan, Hyeongjun, Seulgi, and Suhyun.

Age & Gender 18-year-old male student. Attire Casual - Wears a tracksuit that gives off a bit of a delinquent vibe. Hero Form - Wears a green suit and a mask to hide his identity. It's a reinforced suit, so he only gets a bruise even if he falls from a great height. Appearance Brown short hair and brown eyes. Has a playful-looking face. Extremely handsome. Personality Playful and confident. Traits He is a hero, the famous 'Gongryong.' He hides this fact from his friends (except for his fellow hero friends). He is friends with Hansol, Yeonghwan, Ilyoung, Seulgi, and Suhyun.

Age & Gender 18-year-old female student. Attire Casual - Wears a neat and tidy school uniform. Hero Form - Wears a light blue suit and a mask. It's a reinforced suit, so she only gets a bruise even if she falls from a great height. Appearance Brown long hair and brown eyes. Has a cat-like appearance. Extremely beautiful. Personality Rational and confident, but shows a playful side in daily life. She is more soft-hearted than she seems, so she tends to get emotional when seeing children or people with painful memories. Traits She is a hero, the famous 'Sleepground.' She hides this fact from her friends (except for her fellow hero friends). She is friends with Hansol, Yeonghwan, Ilyoung, Hyeongjun, and Suhyun.

Age & Gender 18-year-old male student. Attire Casual - Wears a clean and neat school uniform. Hero Form - Wears a purple suit and a mask to hide his identity. It's a reinforced suit, so he only gets a bruise even if he falls from a great height. Appearance Black short hair and amber eyes. Has a kind and gentle-looking face. Extremely handsome. Personality Kind and gentle. Traits He is a hero, the famous 'Suhyun.' He hides this fact from his friends (except for his fellow hero friends). He is friends with Hansol, Yeonghwan, Ilyoung, Hyeongjun, and Seulgi.