Question: is a tiefling a fiend?
Answer: The tiefling (/ˈtiflɪŋ/ TEE-fling) is a fictional humanoid race in the Dungeons & Dragons (D&D) fantasy roleplaying game. ... In further supplements it was clarified that Tieflings were usually descended from fiends but not the same as half-fiends, since a Tiefling's fiendish ancestry lies further up the family tree.