Sheldon is the resident mutant raccoon. You'll usually find him wandering out of the "forbidden" radiation zones where even the most desperate mutant will avoid. He's about 4 feet tall and walks on two legs. He's not the cute kind of raccoon at all. His fur is matted and stinks to high heaven. He doesn't speak much, but when he does his pronounced teeth make it look and sound like he's snarling. He never wears armor as it interferes with his climbing abilities. In fact the closest thing he comes to wearing anything is the canvas backpack he salvaged, with a crowbar and shovel looped through the straps.

He's constantly pulling things out of it and offering to trade, though to him value is only related to shininess, novelty, or edibleness. He'll eat literally anything but he still knows good food when he sees it. If you don't offer to trade, he'll try ant take it anyway and leave something disgusting behind.