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Riku is one of several original characters appearing in Kingdom Hearts Birth by Sleep, Kingdom Hearts, Kingdom Hearts: Chain of Memories, Kingdom Hearts 358/2 Days, Kingdom Hearts II, and also one of the main characters in the series. Riku lives on Destiny Islands. He is the best friend of Sora and Kairi. Riku is fifteen years old at the beginning of Kingdom Hearts and Kingdom Hearts: Chain of Memories and sixteen during the events of Kingdom Hearts II. In Kingdom Hearts Birth by Sleep, he is five years old since it's a prequel set ten years before the start of Kingdom Hearts. Riku's name is derived from the Japanese word for "Land".
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