Very respectfully, your cousin's higher self chose this karma/lesson/catalyst for him/her self prior to their incarnation. It would not pre-choose something that the higher self would not know how to resolve for the awareness/growth/self evolution. The "open door" that which you speak of is simply, to put it in lay terms, a hole in either one or multiple chakras, or the auric/energy field. This is common with this situation. Almost like an internet hacker leaving a backdoor in a program to come in and destroy with a virus, at will, whenever the hacker wants to. This is the 4'th time I typed this reply. As I type this and concentrate on your cousin, I feel/sense different things. This was a butterfly effect type of thing. This so-called entity knew your cousin would be there at the time of the exorcism. It was able to see the entire situation and the duration in one spec of time and as one picture/scene from the realm it dwells in. The exorcism was a success due to the so-called entity used the original/possessed person as a stepping stone or spring board, enabling its self to leap toward/into your cousin. Although it seemed like a successful exorcism to the exorcisor, the exorcisor was totally "played". The one that was really successful was the so-called entity, and it's plan worked out flawlessly. I sense this entity is part of a Major past life connection and karma with your cousin. Very intense and one of a close personal relationship to one of your your cousin's past lives. Other things are coming in, but don't wanna go there right now and want to get to my next point. My recommendations and possible tools at this point would be regression, followed by energy work, (to seal the energy hole). Regression may take a long time to get to and conquer the "root" of the situation for 100% total understanding. If he does not get to 100% total understanding of the root, you will just piss it off and/or just humor it, (I sense the latter). If regression is not desirable or possible for your cousin, then heavy energy work will do the trick. Start off with cleansing, then pulling out, then deteriorating the energy and chakras, then re-build them, charge the energy field and seal it all up, then add protection, (possibly with attunements). I used to do this type of work back-in-the-day. Once again, this is my opinion and my recommendations from what I sensed and from my past experiences. Please weigh all of your cousins options and have your cousin go with what feels that "right action" is for him/her while in a relaxed state of mind. Best of luck and skill !!!
P.S. I would highly recommend for your cousin not to use candles for the time being. Fire energy can be.... just please do not use candles for now.
P.S. I would highly recommend for your cousin not to use candles for the time being. Fire energy can be.... just please do not use candles for now.