There is someone that has been to multiple workers looking to get rid of a posessing spirit. Many cleansings, and they all seem to make it worse. I am about to do the same, but I am wondering now if I havent mis-diagnosed it along with everyone else. I don't think the spirit is an attacker. I think it may actually be a guardian.
In my first book I give as one of the four sources of psychic attack, attacks from ones guardians or from ones own psyche, in retribution for misdeads and broken vows. But there is another situation that I didnt think of when i was writing the book: initiation crisis.
In many indiginous cultures the career of a Shaman or Magician begins by being tormented by spirits. They arent really trying to harm you, they are trying to get you to fulfill youir role as intermediary. If you dont, they will keep it up, eventually killing you. This has been reported by everyone from Haitian Mambos, to Nepalese Jhankris, to Russian Saman. It doesnt however happen much in the west amongst europeans, nor amongst Buddhists.
To a typical witch or magician it would look like an attack, but attempts at exorcism would only aggrivate the situation, not make it better. I am wondering if the thing to do isnt quiet it down by making some peace offerings and working with it. It isnt responsive to questioning of any kind, but that would again fit the profile.