【How-To】Where to Watch Inu X Boku Ss

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The mask Ririchiyo carries in her youkai form is called Hannya, a mask used in Noh theater that represents a jealous female demon. The Hannya mask is said to be evil and dangerous, but also sorrowful and tormented, which may be in reference to Ririchiyo’s true personality, as well the complexity of human emotions.