We hope to document that better, but the full Banik bio should cover a lot of ground with that. Not to give too much away, but it has to do with the prophecy of the Chosen One.
You're the second person who has said they've done that. I'm glad you like those. They're not the best, but the story is pretty good (if I do say so myself).
STARS are great, that's why I asked you if others can trust him. I will add some missions that will rely on infiltrating rebel bases, and in such a situation, you have to know you can trust your teammates and they can trust you. I'll try to make STARS rely on teamwork and trust, instead of everyone being highly individualistic and treacherous as in the Sith Order.
There are no changes in personality. He'll be getting new cybernetics, his own ship and a sniper rifle. And then there's been an update of what he's been doing during the timeskip.
Avreet won't hurt an innocent because he doesn't see a reason to do so and it goes against his morals, but he can be pretty sadistic to enemies too. Heck, he crucified a rebel alive as a warning.