Cook up our world in 1926 with some demon seasoning.
In the New York-ian mix, add in one posterior-kicking, gun-toting cute nun (Rosette Christopher).
Complement with a long suffering suppressed demonic partner (Chrno).

Ensure that the two carry a dash of dark history and background, as well as a supporting cast of contrasting characters. Make sure that the two of them kill off the demonic taste.

Stir in a bit of funny facial expressions.Now let loose the concoction on your guests. It's a sure devil delight!