Riko (meaning "child of reason") is Ryouji's younger sister, about 26 years old during the story. She cares a lot about Tetsu and Yuki and has no idea what's going on with those two.
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Riko (meaning "child of reason") is Ryouji's younger sister, about 26 years old during the story. She cares a lot about Tetsu and Yuki and has no idea what's going on with those two.
