The mask worn by the Himuro family master is called the "Mask of Reflection." The legend goes, "It can become the face of an angel or a demon," meaning its facial expression reflects the nature of the one who is wearing the mask.
Inside Himuro Mansion is the Mask Room, where all the masks used for the rituals are kept, and the Mask of Reflection serves as its key. The document mentioned that the mask, when worn by the master, turned into the face of a demon at the last ritual.
