Ryoba Aishi, Yandere Simulator Wiki

Ryoba Aishi is the main protagonist of 1980s Mode in Yandere Simulator.She is the wife of Jokichi Yudasei and the mother of Ayano Aishi. It has been confirmed from the first Basement Tape that Ryoba is the same girl featured in the Mysterious Tapes whom The Journalist confronted. She will be overseas for 10 weeks for Story Mode because she is chasing down The Journalist, as said in Basement Tape #10. Ryoba's appearance is planned to be dependent on Ayano's appearance. Ryoba's default appearance

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Ryoba Aishi, Wiki

Ryoba Aishi, Yandere Simulator Wiki

MMD Ryoba Aishi (1989's) by DaniKH1 on DeviantArt

I found some of those sprites yandere dev uses for videos credit yandere sim wiki and kjech for art : r/Osana

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Ryoba aishi, Wiki

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Ryoba Aishi, Wiki