Who Put the Devil's Crown on My Head?

I'm just an ordinary time traveler, just a little smarter, stronger, and more handsome than the average person... So why do you kneel before me? I can't protect you! Take this sacrifice away from me, I don't eat people! Pope claims to crusade against evil? What does it have to do with me? Want to offer your soul to me? What do I need your soul for? The empire wants to send the princess over as a gift? I don't need it! Etc? You said the princess is a beautiful girl with white hair and red eyes? Okay, yes, I am the devil you call me.