Kishimoto's editors suggested the introduction of Orochimaru during the Chunin Exams arc. Orochimaru became a major villain due to the interruption in the Chunin Exams, impacting the series greatly.

Orochimaru is a primary villain throughout Naruto ... Danzo's childhood was spent in the Shimura Clan, but he is also the only known member of that clan. His motives are often attributed to ...