Sephiroth

Sephiroth was the main antagonist of the role-playing game Final Fantasy VII, released by Squaresoft for the Sony Playstation in 1997. He was formerly a member of the Shinra Electric Power Company's military branch, SOLDIER. However, when he discovered he was the product of an experiment to create a superhuman using cells from the alien Jenova, he went totally insane and killed some people. Then he got tossed into a pit of Mako Energy by some dipshit named Cloud. He later returned five years later for more evil schenanigans.

In Boo's Pizza, Sephiroth is the CEO of Square Enix, which makes sense because he is evil and therefore perfect for the job. His goal is pretty much the same as it always was: become a god. He created a deal with Disney to further his plans, but after a nasty incident where SOLDIERs attacked Disney employees under orders from Rufus Shinra, the deal collapsed, even though Sephiroth wasn't responsible. Ever since then he's been manipulating the conflict between the IPCF and IFPC to get revenge. Also, because he's evil.

Trivia

 * AwdryFan1997 only introduced Sephiroth as a means of countering Dark Boo's monopoly on Final Fantasy characters. This is why he wasn't written well. If Boo's Pizza II were to continue, AwdryFan would likely just place a ban on all Squaresoft characters simply to put an end to this nonsense once and for all.
 * And that's exactly what he did!