Shisui Uchiha earned his feared nickname "Shisui of the Body Flicker" as one of the Uchiha clan's most gifted shinobi, known for his incredible speed. He was Itachi Uchiha's best friend—close enough that Itachi basically considered him an older brother. His death remains murky: he was discovered drowned in a river under circumstances officially ruled a suicide, though the Konoha Military Police suspected foul play.
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