 Throughout the 12th and 13th centuries , accounts continued of tengu attempting to cause trouble in the world . They were now established as the ghosts of angry , vain , or heretical priests who had fallen on the " tengu @-@ realm " ( 天狗道 , tengudō ) . They began to possess people , especially women and girls , and speak through their mouths ( kitsunetsuki ) . Still the enemies of Buddhism , the demons also turned their attention to the royal family . The Kojidan tells of an Empress who was possessed , and the Ōkagami reports that Emperor Sanjō was made blind by a tengu , the ghost of a priest who resented the throne . 
