Being treated kindly by nuns is not usually enough to launch a lifetime spiritual vocation, but it is here, and her mother (a very affecting Julianne Nicholson) treats it with this film's characteristic restraint.
While Lorraine panics over private visions of a demon that looks like Marilyn Manson in a nun's wimple, kindly ghostbuster Ed soothes the kids by crooning an Elvis number to his own acoustic guitar — like the nun in Airplane!