Board Thread:Speculation House/@comment-10390252-20130728185452/@comment-82.12.156.248-20140319065410

Zolnir, I believe she's always wanted a sister but never got one and that it would come into play quite often when it comes to Weiss's relationship dynamics with the rest of Team RWBY. A few possible examples:

- Yang she could secretly admire for being as strong and caring as she is despite seemingly carrying the burdens of Ruby's (and possibly her) past.

- She could in fact be jealous of Ruby and/or Yang, likely both. If she did want a sister, then it's likely a little sister that she wanted, which Yang has, a sweet relationship that serves as a 24/7 reminder that, despite all the materialistic possessions available to Weiss, despite everything offered by her family, she never did get the one thing she truly wanted. With Ruby, she could generally be jealous of the girl, Weiss clearly put in a lot of effort to get accepted into Beacon whilst this child prodigy practically strolled in with two years less work, this jealousy could evolve with Weiss finding more concrete reasons to be jealous (such as Ruby having a sister, and a very caring one at that) as if to justify her envy.

- With Blake... they could bond over the idea of that neither have known what a true family is like. Ruby and Yang did have their family, they still have a caring father and someone to call Uncle, they also have one another. As of now there is no mention of Blake's family save that either her mother died during childbirth or at the very least was a member of the White Fang "You could almost say I was born into it." This could lead to do the two understanding one another's emotions better than Ruby or Yang ever could.

Just a few ideas of course. I'm actually of the idea that as of now she is the lone heiress, meaning any siblings she may or may not have are dead. I personally also don't believe she had any siblings, though I could see her having an older, deceased brother.