It doesn't matter if it's just her or if there were a hundred NPCs with that style. It doesn't fit with the rest of the art. It'd be like walking through a classical art gallery and coming across a stick figure picture on the wall amongst the other paintings. The difference isn't on that level, but it still doesn't look right when put next to the existing styles we have in the game.
Agreed, I can understand them wanting to create a unique looking character but she just stands out in an awkward sort of way.
Not sure if its the hair, attempt at mascara (at first I thought it was a facial glitch) or near invisible eyebrows but its like a badly animated version of my kid sisters' barbie doll.