Well the thing is that what Kreia said is a common sith way of luring people over to the darkside (such as vergere used on Jacen). It's Star Wars Canon, that there's strictly light and dark side. Dark Jedi are just like a lesser sith/archaic term for one fallen to sith teachings. (yeah I hate how narrow minded george Lucas is)
Kreia is clearly sith (Darth Traya after all), and its also obvious she's trying to convert the exile into being her true apprentice, at the expence of her two weaker ones (Sith triumvirate *_* Siths exist as two.).
Also you say he/she... the exile is a she according to the holocron (holocron=geeky name for Star Wars canon).
I hate making posts like this
