Board Thread:General Discussion/@comment-3257939-20131104060426/@comment-16502426-20131112012737

Probably just since Ep. 2 and Ep. 3 didn't really have much for distinctive music, while later episodes did.

Also, per Monty's twitter, whatever we thought Monty said before was apparently wrong. Ruby and Yang ARE blood-related. So I think that really just leaves half-sisters.