Not sure if this is an original character or not. Looks like what a 90's anime character would have but I don't recognise her.
I'm 99% sure it's an original character.
There are very few elves with truly black skin in Japanese IPs—fewer than you can count on one hand. Mostly just Flamela and Dark Link. Besides, people post all kinds of random stuff on /e.
And if she happens to be from some obscure 1980s hentai, then nobody except the original artist will ever be able to identify her.
