Ok, so a new update on the city and some more clues to the characters.
Frustratingly but familiarly low resolution, it's tricky to make out much but he we go:
Starting form the back….
Only a couple of letters in the name, which is about all that is visible - probably Spy
Next in has what looks like fumes coming from a tray of liquid - just like the lady front-right on the cover. Also a minature in that pose, holding a tray aloft. Just like a barmaid…Wording too long for that though
Now this is interesting… looks like a giant blue fish !!! There is a minature that looks to have something coming out from it's back and looping over it's head. (3rd from right) which must be the matching one but who is it from the cover ?? The body of that character looks to be more in the pose of the man with the top-hat and long coat - the crouching position is the same … what the… ??? Perhaps just coincidence and it is the one producing a phoenix but they have chosen to a different 'elemental' for the character card.
Slim pickings on the next one in - just a head, I would imagine the dude at the back - two parts to his name and looks like the minature to the far left. Holding a bag/sack maybe ?
Empty space for the next one and to me that reads like Tinker which would fit in
So, the character on the front card, we can see the most but I am not sure that help identify them. Doesn't really look like any of them.
So in summary, still no idea.