The Ashen Empire
Feared and mistrusted by most common folk, tieflings are the result of demonic blood tainting that of a human’s. Most are born near and around Gorguluk’s Scar, where the hordes of demons spew from. Many tend to be evil, although this is less because of their demonic blood and more because nearly all around them fear and reject them, leading them to embrace their demonic heritage.
Tieflings tend to favor casters, as their demonic blood gives them a natural inclination towards the arcane arts. As as a result, most favor the Warlock, WIzard, and Sorcerer.