Ghouls are undead with a bestial nature to them - where most lesser undead lack intelligence, ghouls show an animal-like cunning, as well as a hunger for the flesh of the living. They will commonly break off what they are doing to feast on an easy target, ripping their limbs off to gnaw on them. The touch of a ghoul is dangerous, and can paralyze its prey, making it easy to feast on.
"Simply remember, keep a calm mind and foster benevolence. Walk in the light, and let goodness be your shield. Someday, we will all triumph over this chaos and evil and allow peace to flourish, but only if we remain steadfast now. The true test is before us every day."
~Lord Gorn Solcastin to Roland Darkstone, on life in Travance