Good concept: Tiefling but with rhinoceros horn
Where, though? Forehead, or, like, right in the center of their face?
They might have a hilarious blind spot in the second case.
I’ve drawn one way before, here, but I assume you could fit them pretty much anywhere. If they’re on the forehead you might get mistaken as a unicorn. Pity the one who has just a blind spot right in front of them, though….
Blind spot so big you can bop ‘em in the face if you sneak up just right. They probably walk around with their head tilted to one side or the other so the blind spot isn’t right in front of them. They have walked into at least 10 narrow poles.