The Devil I see as a trickster that rebels against the very nature of the game being played because it isn't in their favor. In the bible the established order is "God's will" and/or "goodness". Steelmans of the devil's position usually have their basis in individual empowerment and self-acceptance. Trying to naively overturning the nature of a game of subversion just brings you back to order.
The sense of the game I'm getting:
... In a fashion that successfully builds on each other's work and creates something cool.
... and establishes metaphors and mythology
... and teaches you how to be usefully subversive
What if the devil's goal were to short-cut the ritual nonsense and just skip to socializing and eating candy? Justice and the Emperor want their own kind of orders that encompass and utilize the tricksterness of the ritual. The hacker explores how the game works so they can personally exploit it. The devil, though, could want to *break* the game of playing games and telling stories. It's sort of the exact opposite of the fool: you understand how to be a competent trickster but you *don't want to be one* at all. They might state the obvious, or poke holes in everything like the cynic (I think you deleted that one?), in an attempt to short-circuit people from going off into grand lies or stupid extended metaphors. They might push the games to extreme and ridiculous ends to get them over with faster.
If you want to get the malicious, spiteful flavor of the christian devil, make 'em lose a candy for every five minutes the ritual is still going on.