On the effects of mass.

I'm doing this exercise again, but this time I'm giving you some advance notice: these are my Mass Effect characters. Refrain from asking about actual Mass Effect events (especially as I haven't played ME2 through yet and do not want to be hit with spoilers), but feel free to tailor your questions to your knowledge of the ME universe in general (culture, tech, politics, etc.)

1) Dara
2) Cole
3) Brit
4) Zaku