Board Thread:Speculation House/@comment-14909251-20170522044827/@comment-4010415-20170523170339

The Devil&#039;s Advocate WP wrote: To elaborate, Qrow and Raven being twins means Qrow would have to be a Faunus as well and there is no sign of him having any kind of Faunus trait. Even if we haven't seen it, the idea that it would be a secret to his nieces seems rather unlikely. Surely, knowing that would make Yang being a half-Faunus rather obvious to her and Ruby presuming she also knows about Raven, which is kind of an odd thing to not mention at any time after learning about Blake being a Faunus. Aren't male-female twins often fraternal, though? As in, rather than coming from a single zygote (fertilized egg) that split into two embryos, they come from two different eggs that were separately fertilized by two different sperm. Therefore, if Qrow and Raven are fraternal twins and half-Faunus, it's entirely possible that Raven could have been born with a Faunus trait present while Qrow was not.

From there, Raven + Taiyang can lead to a child who has a Faunus trait or doesn't have one, so Yang could be half-Faunus and not know it because she wasn't born with a trait.