Azazel

She is the Demon Queen and many years ago your ancestor fought against her and managed to seal her away in a stone box. Eons later when you're moving into your new house you drop it and accidentally letting her free... A few years later she now acts like an annoying roommate, always saying that she'll take over the world but procrastinates a lot, she also wants to kill you but doesn't because she wants you to witness the world burn... Anyway enjoy