I am a lot like Riven. I think I may be a little bit more like Lux, but they're pretty similar in the end.
I'm an introvert, myself (which many people think is a negative term, but really, it shouldn't be), so I can draw on personal experience for her sort of reactions. I don't really care for formalities and hate ambiguity. I like straight facts and getting my work done efficiently. I like logic and dislike small talk. On a different level, I appreciate people who are self-capable and competent. I also find people who truly put effort into their work to be the most respectable.
I feel Riven would likely share all of these qualities, as they're pretty common amongst introverts.
While I'm not much of a warrior (I'm actually a bit of a pacifist), I can understand her viewpoint really well on that front. She loves her home, she always will, but she feels robbed of it and her ideals. She wants those back, and can only come up with one way of doing so. But she's unsure of whether she's willing to go through with it, and what the consequences might be.
Well, I guess that's a decent summary.