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Kerakera-Onna (ケラケラ女 Kerakera-Onna, lit. laughing woman) is a Yōkai.
Powers and Abilities
Warai-Gona (笑い粉, lit. laughing powder): Kerakera-Onna used this powder on humans and made them into Warai-Byō (笑い病, lit. laughing sickness) where they can't stop laughing.