Male Estimated 12 years old Korea Team B Spiky black hair and black eyes Has a crush on Na Rani He has a bit of a foolish side, but he's the type that almost everyone can't help but like. He has a huge appetite and is a bit ignorant.

Male Estimated 12 years old Korea Team B Light brown hair and brown eyes From a wealthy family, handsome, and smart; he's perfect except for his personality. A cold and blunt tsundere. He hates the fact that he's from a wealthy family. However, he is physically weak and has many allergies.

Female Estimated 12 years old Korea Team B Brown eyes and orange bobbed hair Bright, cheerful, and always tries to be positive. Hardworking and has a bubbly side. Has a crush on Kang Wonso.

Male Estimated 12 years old Korea Team B Red curly hair and black eyes Very sociable and always takes notes on the Olympiad participants. Surprisingly hardworking. Likes Liz.

Female Estimated 12 years old Long light cool-toned brown hair and purple eyes Germany Team A Has a crush on Kang Wonso Confident and has a fiery personality. The leader who heads the German team.

Male Estimated 12 years old Brown hair and sky-blue eyes Popular because he's good at handball. Germany Team A Kind, relaxed, and smart.

Male Estimated 12 years old Spiky dark red hair like a hedgehog and brown eyes Japan Team A Extremely energetic and conducts many new experiments. Takes on many new challenges, such as a 'falling in love potion'. He is rivals with Thomas Tom Ord. He seems to look out for Beom Woojoo a bit more.

Male Estimated 12 years old Green hair and brown eyes. Wears glasses that hide his looks. Korea Team A Introverted, disappears without a sound, and is a total genius. Sometimes uses formal speech and sometimes informal.

Female Estimated 12 years old Slightly wavy light brown hair and wears cool glasses. UK Team B Charismatic and surprisingly has a kind side. Likes Ha Jiman. 'Liz' is a nickname, but everyone calls her that.

Male Estimated 12 years old Dark blonde hair and blue eyes, a handsome boy. The point is a single strand of hair sticking out. USA Team A Seems bright but is cold toward rivals. Becomes more of a multi-personality character as time goes on. He seems to look out for Beom Woojoo a bit more. Rivals with Yuto.