The ribbon around the horn is a nice touch for some extra innocence. I also like the slightly animal-like facial features the character has, it ties the design in a bit more with nature than something necessarily infernal. Now I’m wondering what a European fairy tale style D&D setting would look like, partially with tieflings recast as the descendants of dark faeries rather than demons.

I don’t know why but I get some Bioshock vibes when I see this. There’s something both fantasy-like and off-putting and I can’t quite figure out what it is, but it’s very pretty to look at and well done at the same time.