This sounds like an awesome idea!
I don't know if you're still taking requests or whatever, but I'd love it if you could draw a character from Outcast Kingdom : )
Here's a reference for two of the heroes, Hilda and Gunther (but if you'd rather draw one of the other protagonists, that's fine too)
A couple of notes...
So the characters in this are all classic monster-movie monsters and things like that. Hence the unusual nature of the heroes.
Gunther has no head. So even though his jacket was made for someone with a head, he wears a white 'headless' shirt (cloth covers where the head would be) under it.
In the small picture of him, he's just carrying a bunch of stuff, so don't worry about that. I just wanted a full-body pic for reference.
Also, those things on his chest are buttons-- the line is a string that loops around the black button.
Hilda's kind often have metal sockets built in to their bodies (they're something of a warrior race), which is why her armor is bolted directly to her body and not strapped on or worn in the usual way.
I know there are a few inconsistencies, like Hilda's hair, which has changed from earlier pictures (bottom) to later ones (above), so just do whatever. (Though her face looks better in the bottom picture-- more solid and angled than the rounder ones).
Feel free to use other scenes from the comic as reference if you want.
Oh, number and letter... how about... A4.
Either way, have fun doodling!