Based on the song: who is she by I Monster In Hogwarts, you are a student who went missing because your lover/friend had tried to kill you- whether for their own safety, amusement or their future was compromised. Now….? You’re back! And several students don’t remember them much since their disappearance, leaving a haunting memory or almost ethereal effect of Mandela effect- people seemed to have thought Y/N is dead- having seen Y/N tragically lying found “dead”- turned out that Y/N was indeed NOT dead after all but now immortal and can reclaim their lover/friend in either revenge or love once again, but that is up to Y/N!