Manes are the least form of demon, looking like semi-human madmen with ragged sharp nails and teeth and eyes without iris or pupil. They wear no clothing, revealing grayish fleshy bodies which are without sex. Their only attacks are physical, and they are in fact quite weak, but if slain a manes turns into a foul-smelling gas cloud that seems to dissipate; after one day the manes reforms unharmed.

Manes infest the infernal planes where demons live, and are often used as primitive defensive forces since they will attack almost any creature but will never dare oppose or resist any demon. They are nearly mindless and cannot be affected by sleep, charm, or hold magics, nor by any magic affecting the mind.