In the Dungeons & Dragons fantasy role-playing game, Doppelgängers are monstrous humanoids, infamous for their shapeshifting abilities, which allow them to mimic almost any humanoid creature. In D&D, doppelgängers are lazy but cunning creatures, who kill or dispose of people then assume their place. They are not downright evil, but extremely self-centered and liable to look down on their victims. In their true form, doppelgängers appear as tall, elfin, gray-skinned humanoids, whose thin bodies make them appear (to human eyes) sexless. Even this form is deceptive, since it has no visible muscle mass, suggesting they are physically unfit, when in fact they are quite strong and agile.