I believe Mayfair Games originally designed the general idea of the game for the show. Apparently it was pretty popular so they decided to try to make an actual game.
Normally when I do these character designs they are just variations on the common role playing classes. Knight, Cleric, Wizard, etc.. So needless to say I had no idea what I was supposed to do with a "Brinksman" or "Arbiter". I was just given the name and a rather small picture of the miniatures they were going to use. Thankfully my AD gave me a good idea where to go once I asked.
They wanted to use the sketches on the kickstarter page, so I did a bit more detailed sketch than my usual chicken scratch sketches. Couldn't have everyone looking at those.