Kuriba Ryouko is a researcher best known for her work on the experimental creation of "soul," a project that defined her career. She's the inventor of Indian Poker cards—those dream-recording devices that let people view and experience dreams like playback files. Ryouko first appeared in Dream Ranker, where her research and inventions became central to the story's whole premise. Fans often note how her background in experimental soul creation ties directly into why those cards work the way they do.
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