Being demonically possessed rarely works out well for the host, however, every once in a while things go From Bad to Worse. Perhaps it's just that Evil Makes You Ugly, Evil Makes You Monstrous, or that your body is the plaything of the mind, but when the body your mother gave you has a new landlord there is a nasty tendency for you to be remodeled, and possibly shown off. Sometimes justified in narration as the host becoming the new body of the guest either as an intrinsic feature.