Okay most of this info in this thread is wrong. I just beat the game so let me enlighten you guys,
Bastila is alive if you are LS.
Kreia is Darth Traya not Atris
The Mandalorian girl is Mira
Mandalore = Canderous
Nihilis isn't a very important character he's the first Sith Lord to die
You kind of find out why you have the Ebon Hawk
More info will be given if requested