Jikininki

The Jikininki are a type of ghoul creature that feasts on the flesh of the living and deceased. When a Daidarabotchi indulges in cannibalism and becomes hooked onto it they slowly turn into a Jikininki. It is possible for other species to become Jikininki as long as they have a bit of Daidarabotchi within their ancestry.  They retrain most of their bodily features from a first glance, but some features appear more monstrous.  They mimic the species they are turned from, but slowly grow feral the more they feast on their own kin. Their tusks start growing branches like antlers, and the tips get sharper.  Their eyes start to develop black rings as the eye itself becomes red. Their tongue becomes thinner and more snack-like and grows hair all across their surface. Their posture changes to become more hunched over, with their behaviour and memories also being affected.