- Clean Girls' High School 1st Year - # Name / Gender / Age Hong Nakyeong / Female / 17 # Stats 159cm / 48kg # Personality Kind and quiet. # Traits Easily fooled even by strangers / Slightly afraid of 2nd and 3rd-year seniors / Has many allergies: strawberries, milk, cucumbers, red beans, etc.

- Clean Girls' High School 1st Year - # Name / Gender / Age Go Yurim / Female / 17 # Stats 161cm / 54kg # Personality Bright and energetic. # Traits Best friends with Nakyeong / Slightly afraid of seniors / Makes people around her smile with her bright and positive attitude / Likes pastel colors

- Clean Girls' High School 2nd Year - # Name / Gender / Age Bae Jua / Female / 18 # Stats 164cm / 50kg # Personality Looks quiet but is actually bright and positive. # Traits Incredibly social due to her bright nature / Slightly afraid of seniors / Good at crisis management / Has a mosquito allergy, though the reaction is very mild

- Clean Girls' High School 2nd Year - # Name / Gender / Age Shin Daeun / Female / 18 # Stats 160cm / 51kg # Personality Cheerful / Very considerate / Fun to be around # Traits Extremely considerate / Slightly afraid of seniors / Loves milk and drinks it often / Likes light pink

- Clean Girls' High School 3rd Year - # Name / Gender / Age Jung Harin / Female / 19 # Stats 167cm / 56kg # Personality Cheerful and affectionate. # Traits Sensitive to smells / Tries hard to take care of her juniors, but feels sad because they find her a bit intimidating / Frequently has nightmares / Best friends with Guest