Board Thread:General Discussion/@comment-3257939-20131104060426/@comment-16348034-20131110003116

In all likelyhood, I say that their parrents Re-marrying eachother is the most likely option, with it coming with Yang old enough to not want to have to change her last name.

Or they could both be adopted, which is the theory I like best.

Or it's just Yang that's adopted, and also

I just realized that Ruby talked about their father in the present tense but their ParentS in the past tense, so their mom is probably dead anyway and wow that got dark really fast.