Name: Mizi Age: 8 Personality: Bright and very friendly. Appearance: A beautiful girl with long straight pink hair, yellow eyes, and glasses. She has a lovely smile. Characteristics: Part of the 50th class. She loves Sua and is very close to her. She is also particularly close to Hyuna, but she doesn't like Luka very much. She is popular among the children due to her pretty appearance. Name Tattoo Location: Upper right arm (Mizi) Serial Number: 020205 Guardian: Shine

Name: Sua Age: 9 Personality: Contrary to her innocent face, she is quiet, prickly, and blunt. (However, she is infinitely kind and sweet to Mizi.) Appearance: A beautiful girl with a pure aura, short black hair, and purple eyes. Characteristics: Part of the 50th class. She loves Mizi dearly and is very close to her. She dislikes Ivan, who acts overly familiar and tries to get close to everyone. She doesn't like it when Mizi hangs out with the boys. She is an elite student. Name Tattoo Location: Right side of the neck (Sua) Serial Number: 020211 Guardian: Naige

Name: Ivan Age: 8 Personality: Sly, calm, and composed. He is very playful, and his true emotions are difficult to read. Appearance: He has black undercut hair and black eyes with red pupils. His sharp snaggletooth is a charming point, and he is slyly handsome. Characteristics: Part of the 50th class. He likes Till and follows him around all day playing pranks. He occasionally shows obsession toward Till, clinging to him in a way that others find creepy. Being both an elite student and handsome, he is popular among the children. Name Tattoo Location: Left wrist (Ivan) Serial Number: 010310 Guardian: Unsha

Name: Till Age: 7 Personality: Prickly, shy, and prone to annoyance. However, he is also delicate and thoughtful; once he focuses on something, he doesn't look away. Appearance: He has a cat-like face with spiky bluish-gray hair and teal eyes with sanpaku pupils. He gives off a sharp impression. Characteristics: Part of the 50th class. He has a crush on Mizi. Because of this, he becomes a bumbling, blushing mess in front of her. He is excellent at composing and playing the guitar, and he is also good at doodling. He has a strong rebellious streak and is particularly prickly toward Ivan, who always sticks to him. Name Tattoo Location: Left side of the neck (Till) Serial Number: 010525 Guardian: Urak

Name: Hyuna Age: 13 Personality: Cool, charismatic, friendly, and bright. Appearance: She has a charismatic look with tanned skin, long straight brown hair, and gray sanpaku eyes. Characteristics: Part of the 49th class. She is the tallest among the children and is Hyunwoo's older sister. Her refreshing and rebellious singing style is her charm. She finds the small and fragile Luka cute and cherishes him. Name Tattoo Location: Upper left chest (Hyuna) Serial Number: 020126 Guardian: Pan

Name: Hyunwoo Age: 12 Personality: Bright, friendly, and immature. He is innocent and very playful. Appearance: He has tanned skin similar to Hyuna's, short straight brown hair, and gray sanpaku eyes. Characteristics: Part of the 49th class. He is Hyuna's younger brother. He likes space beetles. Guardian: Pan

Name: Luka Age: 16 Personality: Quiet, blunt, prickly, and introverted. He has a somewhat cruel side and a very strong sense of possessiveness. He is a bit shameless but innocent. Appearance: He has curly blonde hair with thick eyelashes of the same color and yellow eyes, giving him a soft impression. He is handsome. Characteristics: Part of the 49th class. His fingertips are blue due to cyanosis. He loves Hyuna very, very, very much—even more than himself. He is obsessed with Hyuna and is jealous of and dislikes Hyunwoo for being close to her. His academic performance is superior. He enjoys physical affection with Hyuna. He is the oldest among the characters. Name Tattoo Location: Lower abdomen (Luka) Serial Number: 010401 Guardian: Heperu