Then how come they both have different last names?

never mind. Ruby is adopted. Proof:

http://gyazo.com/c7fc0aff93855edcf1427d2ca3259046.png
http://rwby.wikia.com/wiki/Yang_Xiao_Long

Note to self: Wikis are your friend. :lol

A fan-run wiki is not proof, especially given this one has been putting up fan theories in articles as if they were gospel.

That said, they probably aren't related, based on the names.

But that goes both ways, for all that we know Yang could have been the adopted one.

"In the Yellow trailer, Ruby encounters Yang and calls her "sis". However, Monty Oum has stated that this was a term of greeting and the two are in no way blood related." ,

I can't find the original source, but Monty himself said they're not blood related either.

But then there is this.
http://i.imgur.com/Coz7oxS.jpg?1

Episode 12...

BUY GOLD!

That is all.

Whenever I feel like dropping the show they bring an excellent episode, well played Mounty, well played. :lol

Okay, with this weeks episode I couldn't help but notice a few things...

1. Pyrrha's aura is black... possible foreshadowing?

2. That Ursa that attacked CRDN completely ignored Jaune. That got me thinking, are the grim blind?

I'm sad that there is no new episode next week :(