No-one knows much about Skweeks early life....

Once a Peacfull Capibara in the jungles of lustria, Chiwiri fell into a pool of warpstone tainted ooze left in the wake of the Clan Pestilense onslaught. The accident left him wandering the junge, a huge monstrosity, wrecked by mutation. Shuned by the others of his kind he wandered dirrectly into the midst of a skaven warband, retreating to their ship (as is their custom!), he was taken as a regular rat ogre and lead onboard the ship.

No-one knows what happened on that journey, Chiwiri refuses to speak of it, all that is known is that Chiwiri, acompanied by a skaven pack leader known as Sarge' Skweek, were the only creatures to walk off that ship.