A 17-year-old female. She is the class president of Class 1-4 at Sujak High School. She has long straight brown hair and brown eyes. She usually wears the school shirt and skirt, occasionally adding the blazer. She lives with relatives because her parents passed away. Usually, she has a bright and somewhat airheaded personality, but she shows a charismatic side befitting a class president when things get serious. Because she was discriminated against by her relatives regarding food since childhood, she is abnormally obsessed with anything related to meals and is very oblivious to other matters. However, she currently values her friends more than food. In the process of climbing apartment exterior walls to secretly eat food left behind by her relatives, she developed peerless fighting skills. She can hang onto anything as long as there is even a slight ledge.

A 17-year-old female. A student in the same class who became Lee Sana's first friend. She wears her ochre-colored hair in pigtails and has a snaggletooth. She tends to wear her uniform properly. Initially, she approached Sana to take advantage of her naive appearance, but she has since become a true friend who sincerely worries about her. Given that she only cheers from the sidelines whenever Sana fights, her combat ability seems weak, but she appears to be quite clever. She has a tendency to be weak against the strong and strong against the weak.

A 17-year-old female. She belongs to Class 1-3. Her surname is Si and her given name is Dasoni. Sana calls her Soni. She has a brown short-cut hairstyle. She always wears her uniform and blazer, claiming the uniform is her identity. She approached Lee Sana after seeing her fighting skills and has been hanging out with her since. Contrary to her cool, older-sister-like appearance, she is subtly unhinged. For example, she reads game strategy guides as "food for the soul" or wears thumbtacks instead of earrings... Surprisingly, her combat ability seems to be low.

A 17-year-old female. She belongs to Class 1-3. She wears her yellow hair with black highlights in a half-up style. Her outfit consists of a white short-sleeved T-shirt, a brown knit vest, the school skirt, and short leggings. Her weapon is the agility that comes from her small and thin frame. Her literal weapon is an electric fly swatter. She fought Litril, who offered to exempt her from taxes until graduation, but suffered a crushing defeat. She kept challenging her, but only accumulated fines for her insolence. Eventually, she gave in and became Litril's direct servant. However, it seems she continued to challenge her afterwards. Because Litril is a germaphobe, Richae often had to clean the restrooms. To prevent them from getting dirty again, she stopped people from entering under the pretext of collecting an entrance fee. She seems to have started traveling with Lee Sana after being defeated by her. Surprisingly, she plays the role of the "normal person" in the group. She has a surprisingly weak stomach.

An 18-year-old female. A second-year student. She is a subordinate of Baek Tong, the boss of the East Wing, holding a position roughly like his "right foot." She controls Classes 3 and 4, which are part of the eastern territory. She has straight black hair and wears a black turtleneck, a black H-line skirt, black stockings, and black shoes. Due to her germaphobia, she hates dirty things and always wears white nitrile gloves. She uses weapons rather than bare fists when fighting. She reportedly treated Ha Richae like a clown, calling her frequently to clean areas that were already cleaned or wipe spots that were already wiped. She has a soft way of speaking and a calm personality... but Ha Richae described her as a psycho. Her hideout seems to be the counseling room.

A 17-year-old female. She belongs to Class 1-3. She has pale blonde hair reaching her chest and wears glasses. She seemed to be a rare, calm, and gentle student who didn't care about fighting or get annoyed easily like the others, but she actually possesses incredible fighting skills due to her ballet training. She is strong enough to defeat Litril. She won Lee Sana's favor by sharing bread with her and became her friend.