The Sage of the Six Paths—basically the godfather of everything ninja. He's the one who founded ninjutsu itself and shaped what would become the entire ninja world. His whole legendary status comes down to one massive feat: he took on the Ten-Tails, beat it, and then sealed the beast inside himself, making him the original jinchūriki. Everything that came after—all the chakra systems, the ninja villages, the whole infrastructure—traces back to him.
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