Chronicles of Khaldun: Crux of Eternity
254 is a Vassal, a vat-bred homunculus from the Walfismeer, currently residing in Flotsam. Most Vassals are slaves to crazed, fleshwarping wizards, but 254 happens to be employed by Geverspike (even if he still acts like a slave; it is apparently the way of his people).
Also, credit where credit is due. Image source:
Mignola, Mike. “Roger” (2012, November 5). GiantBomb. Retrieved September 18, 2016, from http://www.giantbomb.com/roger/3005-24852/