Ghouls : they were humans who could potentially have done as much harm as the vampires did on Earth , however ghouls were convinced they were acting for the greater good .
Vampires knew humans were committing horrible crimes .
Ghouls : they were humans who could potentially have done as much harm as the vampires did on Earth , however ghouls were convinced they were acting for the greater good , while Vampires knew they were committing horrible crimes .