Robert "Bob" Saget or "Satan (formerly)" is a well-known actor and used to be the evilest most sickest thing ever. He was also the vice chair of the Undefeatables, making him the 2nd most powerful being in existence. Several people, such as Bowser and George W. Bush have sold their souls to him, meaning that Bob Saget was really the evil behind the evil. While he was not serving his position as ruler of Hell, Bob shared a bitter rivalry with the equally evil Princess Daisy.
Ronald McDonald is his arch-nemesis, as they were roomates in College and had a bajillion children. Saget took half, while he ate the other half. Saget had an epic battle with Ronald, and Saget ate his ears and face and internal organs out, thus having to paint Ronald's face white.
Once, Nobunaga Oda took over as ruler of Hell, because he's the Devil King. Bob Saget was notably pissed off and decided to send Evil Snowmen into Hell, but they melted before they could do anything. He eventually bribed Nobunaga to give him back rule over Hell with Candee.
Margaret Thatcher is his right-hand woman.