User blog comment:The Bespectacled Guy/"Your Hopes Have Become My Burden"/@comment-7472785-20130524200834

I agree that Adam pursues his goal without regard to collateral damage to 'innocent' victims - that here being the train operators, so basically non-combattants.

Blake definitely has empathy for those, maybe even towards killing humans in general (Note that in the other trailers there also aren't any human adversaries!). Whether it is only that, or whether she also came to disagree on the goal in general and not just the way to reach it, remains open to speculation. After all, we don't actually know how they are oppressed - be it by human soldiers or by droids like the ones on the train.

It could also be that she became wary of fighting everybody else's fight and believes that each has to find an individual way to liberate oneself from the oppression - such going on to pursue it on her own. In the team to come she may (have to) learn that being a 'lone cat' is not the solution, but that some teamwork, with people of similar attitudes (?), will be required.