You know I read "Rules for Discerning the Spirits" by
Fr. Ludovic-Marie Barrielle about 14 years ago. Boy did so many strange things happen after reading that book. Does that mean I should avoid all books like that?
The devils are smarter than us. They know how to scare us, it has nothing to do with the occult. The best thing is to have no emotions, when it comes to preternatural stuff.
Why was it only the girls room? Why was it not the whole house? Why was it not affecting the parents and the boys? The devil knows how to draw on the emotional weaknesses, especially in women. They didn't need the blessing from the priest all they needed to do was to tell whatever was scary them to go back to hell where it came from.
I have a lot more personal experiences then the one above. If you are with God then just tell the demon to go away in the name of Christ. Just pray a Hail Mary every time something like that happens. The more you turn to God the more the demons leave you alone.
Yes there are special circuмstances that you will need a true exorcist, but this Padre Peregrino is just a lay man. At least by how most of us here on CathInfo think.
Sorry just my two cents, take it or leave it.