It'll be interesting playing the paths for those two.
With Lucy always having been compared to Charlie, and Suzy struggling with trust and anger issues, presumably a consequence of how the father left.
While Lucy may not have been exactly competing with her sister (after they grew up at least), she does seem to have a fairly fragile sense of self esteem, and has even tied her own career and happiness to that of her sister, the very thing she feels insecure about. There is probably fairly normal left over sibling rivalry involved as well.
Suzy is fiercely loyal, I think, and will fight anything she thinks is threatening her family, but also the most independent of the lot. There's some mother-daugther tension. We haven't really seen that much of her yet, so it's hard to pop-analyze her
Either way, both of them may actually turn out to be the most
interesting women in the game.