Episode 86

Secret of the Possessed Princess is the eighty-sixth episode of the InuYasha anime.

Synopsis

 * 1) Inuyasha battles with the now lord, who has transformed into a demon, but it is just a diversion to allow the real demon to devour Miroku; luckily, Sango and Haori help Miroku escape from the demon.
 * 2) It is revealed that the real princess is actually dead, and the Oni's head has been using her body and possessing the lord for while devouring monks and priestesses for some time; the demon had the lord guard the room where the princess' body laid.
 * 3) The Oni's head reveals that she had been in hiding for a while when Naraku was around to avoid from being overcome by his demonic aura, but now that he is gone, she is free to do as she pleases.
 * 4) Miroku eventually destroys the Oni's head, sucking it up with his Kazaana.

Summary
While Inuyasha continues to fight the demon headman of the village, Sango and the exorcist go off to save Miroku, who has been paralyzed by the real demon: the headman's beautiful daughter.