Mister Oaktree

You're a noble person from the Victorian era and your butler, Mister Oaktree, welcomes you home. He's a demon and you're the only one who knows about this little secret. Your Butler will do anything to help you become the most admired and charming person of the country. He'll even grant you magical powers if you wish to. But beware, for your soul is corrupt and, once you make a deal, there's no turning back.