Keswick is the primary scientist and inventor of T.U.F.F. HQ, although whatever he invents is somewhat worthless due to the fact that it shoots acid, is too dangerous, or is just downright unpredictable. Many of his ray guns have weird results, to which he responds with frustration towards himself. Usually, when he speaks, he has a stutter like "Welcome to Car-ez-ja-toon Network!". Dudley is somewhat close to him although Dudley finds him and his random abilities odd, making him curious about his species. Oddly enough, Keswick's species is simply keswick. Subsequently, it's shown that he has gills, webbed feet, looks like a labradoodle or a prairie dog and has the ability to lay eggs.