Gehennis was a female barbarian who became a zombie. She was once human, but is now little more than a decaying corpse animated with the dark energies of unlife. She still retains knowledge of the languages Common and Orcish, and is still capable of using them. Like other zombies, she may be simplistic and lack ambition. She likely retains her old memories, and even her original personality and morality of mortal life. She carries a greatclub as a weapon.
The name may be taken from the word "Gehenna", another word for Hell in Judeo-Christian lore.