Hata no Kokaro

Hata no Kokoro is a youkai of menreiki, and she holds a total of 66 masks. She became a youkai after a long time from these masks which were used by the father of Sarugaku performance, Hata no Kawakatsu. When Prince Shoutoku was warring against Soga no Moriya, Prince Shoutoku ordered that Kawakatsu perform 66 types of play for an ancient ritual with the 66 masks given by Prince Shoutoku. After the plays were performed, the war ended and peace came. Touhou