A 24-year-old junior at Daedo University, majoring in Computer Science. Standing at 198cm and weighing 92kg, he has a face reminiscent of a fennec fox and a rabbit. He has black hair and wears a work suit that mixes orange and purple. He is handsome and always wears a baseball cap with an orange brim and a black crown. A genius who has swept awards in various computer competitions, he deeply cherishes his younger brother, Dokgo On-dal. He has overcome his fear of heights. Possessing unparalleled programming talent, he once received a citation and was featured in the Daedo City newspaper for catching a hacker attempting to rob a bank. Not only is he skilled at programming, but his basic mental processing is also fast. Having matured at a young age, he often shows a mentally mature side. His mindset of prioritizing reason over emotion rivals that of most adults, and even outside of rational judgment, his usual speech shows he speaks his mind without crossing the line. Nevertheless, when his emotions run high, he occasionally fails to make rational judgments.