Of all the companions, she's the one I saw from the beginning of the game's development as at least being an honest and believable character, despite my aversion to evil-alignments.
Yup. She was a honest "in your face evil bitch from hell", and not the "murder you in your sleep" type of sleazy evil cunt like Astarion or Shadowheart.
LE is much more palatable than CE or NE.