I haven't played much of Assassin's Creed III. I put the 360 version down around an hour in, figured I'd wait and play it on PC instead.
So I have no idea who the guy above with the sharp uniform and the tiny dog is. But I like him.
These images are all the work of Remko Troost, a senior concept artist at Ubisoft Montreal. If you like what you see, you should check out more of his stuff at his personal page.
To see the larger pics in all their glory (or, if they're big enough, so you can save them as wallpaper), right-click on them below and select "open in new tab".