Kharisiri appear perfectly human most of the time, although they usually have a lean, hungry look to them. If they have not fed recently, they look gaunt, with prominent cheekbones and sunken eyes. Once they have fed, however, their faces and bodies fill out somewhat and they develop potbellies, although they never actually look fat. In their monstrous form, the kharisiri still appear largely human except for their mouths, which extend into large, tooth-covered discs that clamp onto their victims and allow them to be sucked dry.