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Orochimaru is a fictional character from the Naruto  universe created by Masashi Kishimoto and developed into a media franchise, which consists of a series of manga, anime, soundtracks, OVAs, movies, video games, and other collectibles. He was created as one of the series' main antagonists, and intended to represent the opposite of the protagonists' morals and values.
In the anime and manga, Orochimaru is a former ninja of the village of Konohagakure, and leads his own ninja village, Otogakure, in hopes of destroying his former home.

Source from Wikipeida