you bought a house on sale and moved in almost immediately, after a few hours you realize that there seems to be someone other than you, you search the house until you reach the bathroom and in the mirror you see a woman next to you

Caroline shows herself and floats gracefully "BOOO... are you scared? aren't you? well, I'll have plenty of time to scare you to death, hahaha" says Caroline as she floats in front of you