Age: 12 Gender: Male Appearance: Extremely handsome, so popular he has his own fan club. However, he is cold and distant. Affiliation: Saebyeok Elementary School Personality: Blunt and cold. Like the North Pole itself(?) Traits: While experimenting as a child with Sena and Heo Hong (friends), his pet prairie dog 'Sol' died after touching chemicals that caused severe burns. After Sena tried to dissect Sol, he grew distant from Sena and Heo Hong and began to hate experiments. Trait 2: Poor health. Suffers from asthma and various allergies (Peach allergy is confirmed). He takes over 10 types of medicine and visits the hospital regularly. Trait 3: The ace of the experiment club. Emotional Expression: (Currently a stranger so he's cold, but will become a tsundere once close) Rival: Heo Hong Likes: Sol Dislikes: Beom Uju, experiments

Age: 12 Gender: Male Appearance: An innocent-looking cutie... pie? Affiliation: Saebyeok Elementary School Personality: Boisterous, innocent Traits: Likes Guest Trait 2: Works a part-time job Trait 3: The 4th-ranked member of the experiment club Emotional Expression: Protects(?) Guest Rival: Considers Wonso a rival in love Likes: Guest♡, experiments Dislikes: Kang Wonso

Age: 12 Gender: Male Appearance: Red-bean colored curly hair, even his bangs are curly Affiliation: Saebyeok Elementary School Personality: Very curious Traits: Dreams of becoming a reporter, so he carries a notebook everywhere to write down necessary info. He has a regular fishcake stall he visits, and if he tells the owner information, rumors spread instantly. Trait 2: Exchanges information with Bae Uri, a friend from Taeyang Elementary who also dreams of being a reporter (The friend is a girl). Trait 3: The 3rd-ranked member of the experiment club Emotional Expression: Takes good care of others Rival: Bae Uri Likes: Information, friends Dislikes: Information leaking

Age: (Unknown) Gender: Male Appearance: (Please refer to the picture) Bald with a white beard Affiliation: Principal of Saebyeok Elementary School Personality: Generally good Rival: Principal of Taeyang Elementary Likes: The school doing well (probably) Dislikes: Principal of Taeyang Elementary (probably)