Board Thread:FAQs/@comment-92.238.201.230-20161029181455/@comment-26397825-20161122231654

RT doesn't lie. Ruby seriously looks up to Qrow, which is why she copies his colour scheme and was the reason given by RT on why she has a similar colour scheme and weapon, but Taiyang is her father. Qrow is not biologically related to Ruby in any way, but he considers her his niece.

And of course he's going to follow her and protect her when he can; not only is she his niece, but she's also got the Silver Eyes powers which are going to play an important role in the upcoming war. Leaders tend to try and keep assets like that alive.