Hennef appears almost emaciated. His skeletal frame is encompassed by taut scarlet skin with spindly legs and arms dangling loosely. His head is unnaturally large for his body. A tuft of wispy white hair rests between two black spiralled horns on Hennef's scalp. Bushy eyebrows hang above his large beady black eyes. Hennef has a hefty angular and crooked nose. He has thin lips and unkempt an beard.