http://www.swtor.com/blog/your-legacy-begins
You can have marriages, children, siblings, allies, rivalries, etc...
And yeah, I named my Gunslinger Vette because of my Juggernaut. My Jug uses my main character name when I play MMOs, and the Story was my first and most amazing experience in the game so far. Vette is by far my most favorite Companion in the game too.
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http://dl.glitter-graphics.net/pub/256/256671ex078gxgzf.gif