hmmm. what if. becoming a ghoul put a cap on your memories. like. the moment you turn back into a human again (if possible) you forget your entire life when you were a ghoul. all you know is that you made a deal with a demon, and then. just. blank. you don't know what that gap in your life was, and it unsettles you. but you know you're normal again, somehow.
there's an aching familiarity when you're at certain places, and you attribute it to the gap in your memories, but you can't remember why you feel this way. why your heart beats a little bit faster every time you see someone who vaguely reminds you of someone else, but doesn't. why you feel like you've done this before, but it doesn't quite click.