Half body vertical split

Nasnas

only half a body: one eye, one arm, one leg, and half a face or torso, split down the midline as though a whole person had been cut in two

Shiqq

The Shiqq is described as literally half a creature: a body split down the vertical midline, leaving it with a single eye, a single arm, and a single leg, and it is said to move by hopping on its one leg.