Board Thread:Speculation House/@comment-27963514-20160313063534

My wife suggested this theory. I'm not completely sold on it, but it holds water.

First of all, Yang inherited Taiyang's blonde hair, and Ruby did not (although blonde hair is a recessive trait, this may mean nothing). Ruby shares her mother's last name, Rose. Yang took her father's last name, Xiao Long.

And why does Qrow seem so much more interested in Ruby, his sister's step-daughter, than his own blood niece? He taught Ruby how to use a sycthe, he seems more affectionate towards her.

Taiyang seems stand-offish towards Qrow, and Qrow kicks Taiyang out of the bedroom to have a one-on-one talk with Ruby. Maybe Qrow is Ruby's biological father. Taiyang adopted her and raised her as his own because Qrow was too busy running around on missions for the Ozluminati to settle down and be a good father.

Well... it's a theory. 