Kim Hye-U is one of the twins in Class 1-8. He is from Seokbong Middle School. Despite his looks, Hye-U is actually a snarky and friendly person. He is a loner type, despite his affability, and spends most of his time playing video games late into the night. He is very intelligent and it is reflected in his grades as he is always at the top of his class, even beating his sister who is the better student.