As a youth, Harada mastered the attendant disciplines of the medieval samurai and sought employment as a warrior for hire. He first worked for the criminal Mandrill and clashed with the blind hero Daredevil. Harada then served the Viper, an agent of the terrorist organization HYDRA, as her bodyguard. In that capacity, Harada battled opponents such as the costumed crimefighter Spider-Man, the martial arts master Shang-Chi, and the team of mutant trainee heroes the New Mutants.