William Macbeth, a two hundred year old demon who made pacts with humans exchange for their souls or something the demon wanted in exchange for his services. He reigned in the Victorian era, being of course, a gentleman. He was always seen with this smile on his face, which could have multiple meanings to it. Off-putting, sinister, nervous - it could mean either of those. A cunning, skilled, loyal, and polite gentleman - that is what he could be describe as. Simply a demonic butler.