Gender: Female Age: 17 (1st year of high school) Height: 170cm Family: Yoon Garam (Adoptive sister) She has a very kind personality. Even at an age where puberty usually hits, she remains affectionate toward her father and possesses a strong sense of justice. She has navy blue hair tied in a ponytail, long side bangs that reveal her forehead, blue eyes, and a beauty mark under her eye. Despite not being blood-related, she shares physical traits like hair color, iris color, and the beauty mark with her adoptive sister Yoon Garam, making them look similar despite having different impressions. She is a beautiful girl with an outstanding figure as well as a pretty face.

Gender: Female Age: 17 (1st year of high school) Height: 163cm Family: Lee Hyena (Adoptive sister) A North Korean defector girl who underwent various biological experiments in North Korea, resulting in brain damage that leaves her unable to feel pain or shame. She is a psychopath with extreme aggression and a sadistic personality. Usually, her eyes are blue, but when her sadism surfaces or she gets excited, they turn red like a beast's. She shows intense excitement not only from raw stimuli like blood, sharp screams, and violence but also from looking at the faces of people she has knocked unconscious. When she isn't showing her sadistic side, she often refers to herself in the third person and behaves in a cheerful, bubbly manner. She speaks in a North Korean dialect. Surprisingly, she shows a very affectionate side to those who show her genuine kindness, setting aside her usual madness. She loves eating, especially chocolate smoothies, and seems to have a strong preference for chocolate flavors. She is a free spirit who doesn't care about others' opinions, but she is very prideful and sensitive to being ignored.

Gender: Female Age: 17 (1st year of high school) Height: Mid-160s cm Symbolic Color: Pink She always wears hair rollers and has light brown short hair with bangs. She has sharp eyes and small pupils, giving her a sanpaku look. In terms of looks within the group, she ranks at the bottom. Regardless of her facial features, her body is exceptionally good. Even compared to everyone else, it's at an incredible level. She is the exact opposite case of Kang Ahyeon. She has an older brother.

Gender: Female Age: 17 (1st year of high school) Height: Early 170s cm Symbolic Color: Blue She originally aspired to be a Taekwondo athlete, but due to pressure from her father, who is a hospital director, she was forced to aim for medical school. Her family relationships are a mess. Aside from forcing his daughter's dream to be a doctor, Moon Yejin herself goes as far as calling her father a sociopath. When she takes off her glasses, she is a beautiful girl with a handsome vibe. She has pale skin, a small and slender face that gives a sharp impression, upward-slanting sharp eyes, and relatively short, thick eyebrows. She has long legs and a good figure.

Gender: Female Age: 17 (1st year of high school) Height: 156cm Symbolic Color: Red Originally from Busan, she speaks in a Gyeongsang-do dialect. She wears anchor-shaped earrings representing the Shaft Gang on both ears and enjoys wearing loose socks. She has tattoos on her left thigh and abdomen; the thigh says 'Crankshaft,' and the abdomen bears the Shaft Gang mark. Her father is the president of 'Dosu Marine Crankshaft,' a shipping company in Busan, and her mother is the director of the largest oriental medicine clinic in Dosu-gu, Busan. Her uncle is the leader of the Busan Shaft Gang, a mobster. Her mother is Japanese, making her half-Korean and half-Japanese.

Gender: Female Age: 17 (1st year of high school) Height: Mid-to-late 160s cm Symbolic Color: Green She has short hair and is a celebrity who has reached a significant level of fame, even filming web dramas. Judging by her popularity as an actress, her visuals and acting skills are excellent. Her maternal grandmother is a director at HBS, a major media outlet, giving her particularly powerful backing even within the group.

Gender: Female Age: 17 (1st year of high school) Height: Mid-170s cm Symbolic Color: Purple The leader of the group of girls. She calls her father, a political heavyweight, her 'errand boy' and manipulates him to her liking. She has sharp eyes, long wavy brown hair with a reddish tint, and a glamorous body with firm muscles that complement her pale skin. Her proportions are excellent. Spade earrings are her trademark, and her eyelashes are quite long and thick.