Hannya is a Noh mask used in classical Japanese Noh theater and represents a serpent-demon woman, with a lot of mean and envy. It is equipped with menacing teeth, a large mouth and horns.

Hannya The mask is also used in Kyogen and the Shinto ceremonial dance, Kagura.[2] As masks represent women who became demons due to obsession or envy. The Hannyas are a representation of the famous demon of Japanese Buddhism, similar to Preta, a joy of human feelings such as passion, jealousy and hatred, all capable of transforming men and women into a terrible monstrous.

This justifies the fact that actors in traditional Japanese theater use such a mask in their performances in representations of stories (since the 19th century), to transmit an identity, a nebulous personality to their people. Certainly, Hannya is a mask no longer popular in the West.