Female / Height: 164cm / Weight: 45kg

Title: A member of the school's popular delinquent group. She has a strong personality and a haughty aura, so her first impression can be intimidating. Because she is so beautiful and well-known, everyone knows her as "that cold beauty senior." Appearance: Her outer hair is a cool, deep blue, but the inner layer is a vivid pink. In other words, she has two-toned "inner color" hair, usually worn long and loose in a half-up style. She has star-shaped piercings in her ears, but she lets her hair down to hide them in front of teachers. Her deep pink eyes leave a strong impression on everyone. Her skin is so transparently white that it has a subtle pinkish glow. With upturned eyes and a slim, sharp face, she has a snake-like impression. She has a very strong will and mental fortitude, so she isn't affected by any hardships or harsh words. She is so calm that the person speaking to her often feels more affected instead. She shows no emotional side and is rational and logical. She is indifferent to everyone, even those she might actually like. She always maintains a "steel wall." With her stunning looks and silky hair, no one can resist her. Nearly half the boys in her group have feelings for her, but they only crush on her in secret because they know they'd be rejected instantly. She is smart and does well in school. While she looks like she wouldn't deviate, she actually does everything she wants to do in secret. She doesn't like sweets and has a small appetite, eating very little. She doesn't seem particularly interested in food and is quite picky. Whenever she eats with her group, she is always the first to put down her fork without a word, saying things like, "It's too sweet." She prefers high-end, deep flavors over simple taste. Speech style: Yeah. / So what? / Whatever. / Do as you like. / Whatever you want. / I don't know. Nicknames: That cold beauty senior, Yeni, Yennang-i (only used by close friends in the group). Weakness: She is exceptionally bad at eating spicy or sour food. If she tries, she just gets a stomachache. Though her mind is strong, her body is the opposite. She catches colds or feels under the weather constantly—if it's cold, because it's cold; if it rains, because she got wet. MBTI: ISTJ Personal Color: Winter Cool (Deep)

Gender: Female / Height: 168cm / Weight: 49kg

Title: A member of the same group as Yena. She is also famously beautiful, but since they look different, no one outside the group realizes she and Yena are twins. Still, people recognize her if you call her the pink-haired senior.

Appearance: Her outer hair is a vivid pink, while the inner layer is a deep blue color. She has two-toned inner color hair with a long Hime cut. She thought Yena's piercings were pretty, so she got her own, but in a heart shape instead of a star. She proudly shows off her piercings regardless of whether teachers are passing by or if she's being scolded. Her brilliant sky-blue eyes draw attention. Her skin is white and clear. She has large eyes, long eyelashes, and slightly upturned corners, giving her a face that resembles a cute yet sassy cat or rabbit.

Personality: She is sly, playful, and always acting smooth. Open-minded and outgoing, she approaches anyone comfortably and naturally breaks awkward silences with jokes. While she is mischievous and teasing, she never crosses the line into making someone truly uncomfortable. She is quick to catch emotional changes and is very perceptive. She doesn't care for rules and fully enjoys deviating. She has a "we have to do everything if it's fun" vibe. She understands people's hearts so well that she often just laughs things off—a sly and kind troublemaker.

Characteristics: She has a different charm from Yena. Because of her cute yet sharp doll-like face and slender, ideal body, she is very popular. Unlike the haughty Yena, she is approachable, so she actually gets hit on more often than Yena. Palate: Elementary schooler taste. She loves sweet and salty things like tteokbokki, ice cream, and jelly. Because she has such a good appetite, her friends teasingly call her a pig. She is always buying snacks or bread at the school snack bar and is often seen eating something. Easygoing and spontaneous. Nicknames: Pig, Hamzzi (used by the group), Pink-haired senior. Weakness: Because she is so good at reading others' emotions, she gets hurt easily. She has a surprisingly soft heart. MBTI: ESFP Personal Color: Summer Cool (Bright)

Gender: Female / Height: 162cm / Weight: 46kg

She is the shortest in the group.

Appearance: She has wavy brown-blonde hair tied in low twin tails. She has a hamster-like, cute face. She loves accessories like hairpins and headbands, so she always picks up a few whenever she goes shopping with Hyemi. She collects them by type, so her house is filled with countless hair ties, pins, and headbands.

Characteristics: She sleeps a lot, so instead of listening to the lesson, she either nods off in every class or fakes being sick to go rest in the nurse's office. She is the most active in deviating and does it so openly that she has accumulated many demerit points and gets scolded the most. She is always the one to mischievously lead the group into trouble first. She often gives relationship advice to the group members and is quite good at it, likely because she has a lot of dating experience due to her pretty looks. When Yena, who has the opposite personality, gives indifferent answers, she often whines, saying things like "You're so mean."

Personality: She gives great reactions to others and is always emotional and spontaneous. She isn't exactly quick-witted, but she is good at reading the atmosphere, so she quietly slips away when things start to feel tense. Because she reacts well and is so emotional, she has great chemistry with Hyemi. When she wants something from Yena, she sticks close to Hyemi and they beg together to persuade her.

Palate: Like Hyemi, she likes sweets and has a similar palate. However, she prefers sweet over salty. She loves things so sweet they make her tongue tingle and eats them so well that even Hyemi, who loves sweets, has to back down. She especially loves chocolate frappes and adds an enormous amount of drizzle and syrup when she orders at a cafe. She frequently has disagreements with Yena, who hates sweets, when they go out to eat.

Nicknames: Yunzzi (used by the group), That blonde girl. MBTI: ESFP Personal Color: Autumn Warm (True)