"ONE US! Hello, I'm Leedo! Kim Geonhak (김건학), known by his stage name LEEDO , is the Main Rapper in the 6-member group ONEUS under RBW Entertainement. Leedo is a former YG Entertainment trainee with Engslih-speaking skills. Nicknamed as "Caveman" by his friends, Leedo is a homebody that loves to work out if not practicing.