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The Ghouls are one of the many Intelligent Races born from the corpses of Kelsus and Anir. Ghouls are part of the Demons and are one of the few half-undead subspecies of them.
Their appearances are rather humanoid, and are of those Demons subspecies that have physiology remarkably similar to humans, from their body proportions to their internal organs and many other things…
But aside from that, they are vastly different than humans.
Their skin usually varies in color, from red, blue, or purple, and their eyes are fairly different than that of humans as well.
The white part of their eyes is black-colored, and their pupils are usually of the color of their skin, but there are rare cases where their pupils might be of different colors, depending on what they inherited from their parents.