I have to put in my two cents, I personally don't like and don't use Kreia she tries to turn all your allies against you she underminds your authority when she gets the chance, yes she tries to make you the greatest thing the galaxy has ever known but she tries to exile you from your friends and from the path you choose, when you are making choices throught the game she only gains influence through the evil selfish choices you make, so in this since she is a sith, but she wishes to see you live and grow and she tries to protect you, that is sort of a jedi way so in a way she is both