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- Symposium of Post-mysticism states that the brown tufts on her head are in fact her ears.
- Kyouko's last name is incorrectly spelled Kasoya instead of Kasodani on the game. It was fixed on v1.00b.
- Her first name 響子 (Kyouko) could mean "Echo Child". Her last name 幽谷 (Kasodani) could mean "Tranquil Valley".
- Kyouko appears on the jewel case of the trial version of Ten Desires.
- Before launching her next attack, Kyouko's sprite changes and appears to be shouting. In addition, her ears vibrate so fast they become a blur.
- Kyouko's personality allows her to bore easily, and her mundane tasks at the Myouren Temple leave her dissatisfied. Because of this, Kyouko joins Mystia Lorelei to make a punk band by the name of Choujuu Gigaku, as seen in Symposium of Post-mysticism's first Bunbunmaru Newspaper article.