Shadow Reflector Naga The White Serpent, all the same skills and power of the original, but with a mind in the complete reverse of the original.
So we have a very shy, yet friendly outgoing woman that wants to help people as much as she can, without hurting anyone.
from the old CPM Manga series of Slayers Special Vol. 2
and the anime variant from ADV, although the manga one has the outfit :3