The Evil Within Demon's Head Castle is the eighty-fifth episode of the InuYasha anime.
- Inuyasha and his friends meet an old exorcist and she tells them of the curse of the demon's head castle, where the head of a demon was supposedly buried underneath.
- They all go to the castle to investigate, and find that the lord has likely been possessed; they learn that a massive demonic aura is surrounding the castle, though the exorcist is unable to sense it.
- Many monks and priestesses have tried to exorcise the demon before, but with no success.
- The princess of the castle takes Miroku down to where the demon's head had been buried; it is revealed that she is actually the demon, and lured him down there to devour him.
Inuyasha and his friends run into an old woman, Madame Exorcist, fighting a demon and save her. After she introduces herself as a demon exorcist, they decide to join her to fight an oni haunting a nearby village.
Characters in Order of Appearance
- Madame Exorcist may have truly been one in her prime, but it seems her spiritual powers and awareness have left her in her old age.