Board Thread:Speculation House/@comment-10403005-20130604071723/@comment-67.193.182.59-20131020163908

I don't think that Ruby is a cold-hearted killer, but I don't think she's innocent, either. The fact that she looks very different from Yang, and that they have different last names seems to imply that they're not blood related. Red Like Roses II (which is probably about Ruby given that Red and Roses are very prominent themes for her) implies a pretty tragic past. Combining the two, Ruby is probably and orphan taken in by Yang's family.

My point being that Ruby probably isn't completely innocent. Her perpetually upbeat demeanour  is likely masking a deep sadness/anger; one that we haven't seen yet because right now she's adjusting to her new life as the leader of team RWBY, and has no time to dwell on the past.

I figure we'll learn more about Ruby in later seasons, when the world opens up a bit more and the focus shifts away from Beacon.