Ghouls or necrotic post-humans, are decrepit, rotting, zombie-like mutants. They are humans who became the recipients of intense and prolonged radiation sickness which has led to the decay of their skin, and in some cases ligaments. They have also gained greatly extended lifespans, though they are sterile and are immune to radiation.
Ghouls have heightened senses making them more perceptive and lucky than other wasteland humanoids. As a result, chems like jet barely affect them. Although they lack strength due to tissue decay. Feral ghouls are zombie-like and lack intelligence - lashing out at anything that moves. Non-feral ones, are generally as intelligent as normal humans. However, their physical repulsiveness makes the life of a ghoul difficult at best.