Board Thread:Speculation House/@comment-24.247.91.107-20140511154823/@comment-66.169.41.184-20150308235824

...so would this make Yang half-Faunus? What are the genetics for that, anyhow?

I think that Taiyang is Yang and Ruby's common parent. In V2 (I forget which episode) Yang is comforting Blake, and tells her that story of slowing down an obsession before it destroys you.

Yang specifically mentions that Taiyang had a love before Summer Rose; her mother. Since Ruby herself was only a toddler when Summer died, and Yang's mother left long before Yang knew she even existed, it's safe to say that Yang's mother was his "first love", and Summer, Ruby's mother, was his second, making Yang and Ruby paternal half-sisters.

Onto Qrow, I assume he's Raven's brother and (if Raven //is// Yang's mother) a close friend of Taiyang. Meaning he's biologically Yang's uncle through Raven (isn't Qrow's last name Branwen as well?) and nominally Ruby's uncle, she was just too young to be able to tell the difference, and when she got older, Taiyang either didn't explain this to her, or his not being blood related to her didn't matter enough to her for it to bother her. An uncle is an uncle is an uncle.

So in my theory, Yang is half-Faunus, but the genetic traits for that are strange and either she's hiding a stubbly pair of chicken wings under her shirt, or the genetics worked out where Faunus traits never showed up in her.