Talk:White Cloak/@comment-70.114.209.217-20131113215416

It is speculated --and said-- that the grave belongs to Rose's Uncle Qrow, implying that the white cloak possibly belonged to HIM.

And the siblings are BLOOD-RELATED, stated by Monty Oum but probably only share one parent because of the last names. Most likely, a mother. And it is also stated that Cinder (Crimson witch) is related to Ruby when Monty was answering some questions on a forum.

Notice how Cinder and Yang are both able to summon fire, which is Yang's semblance.

So noting this evidence, Cinder could very well be Rose and Yang's mother, implying they have different fathers.