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Aberno was a Blue Demon, a rare caste of Demons that originate from Green Skins. But what is the difference between Green Skins and Demons? There is certainly not many, most humans and other non-demon races consider them as Demons, despite Demons themselves considering them monsters. This is because unlike most Demon Races, Green Skins are overly barbaric and lack emotional development and thinking outside the box, their common sense is also null, and they seem to be very primitive, but certainly, they were very different from monsters, and certainly more intelligent than common wild beasts.
