This is a little belated: I did this a long while back. Remember how I mentioned that Demalion would likelier bake you into cookies as feed them to you? Let me use the following conversation to illustrate:

"Okay, Demon, well, we Summoned you... Might as well use you. You will fight for us!"

"Fine, why not. But I get every soul of every person we kill."

"Souls? What d'you want souls for? You're a demon, not a devil."

"Taste good in cookies."