Damn, your the real deal. Anyway the one I am looking for is where the 'Demon Purple TitsS SkinL AssS' character in. (Demon>Female>Loli+Teen).
Vouivre Nivernais from Venus Blood: Lagoon.
She's actually a dragon girl and not a demon girl but you can't really tell that so I went with what I thought people would assume if they saw her.