"Ghouls are mortals who have ingested the potent blood of vampires, though not always of their own free will. This powerful elixer carries the curse of Caine's damnation, and infects, to a degree, every creature that consumes it. Most notable among these are human beings, but the effect is not limited to them alone. Animals of all kinds can become ghouls.
In Mind's Eye Theater, the ghoul's part has commonly been passed off to inexperienced players so they can learn the game by watching their Regnants go through the motions (and by staying out of the way of important plots). Unfortunately, this has led to the prevailing notion of the expendable ghoul. This is an unacceptable state of affairs, and is not true to the World of Darkness. Ghouls are neither peripheral to the world of the Kindred, nor are they disposable" (Liber des Goules)