"Hannya" is a type of ghost or more accurately, a vengeful spirit in Japanese legends. It is said to be an evil spirit formed by a woman's intense jealousy and resentment. In other words, the original form of Hannya is a living person, but due to intense jealousy, their spirit temporarily detaches from their body, transforming into a fierce ghost to harm others. Even the individual themselves may not be aware of this process, subconsciously believing it to be merely a dream.
Glue is required to attach the mask to the base