It was Summer right? I swear Ruby is Qrow and Summer's child who was raised by Tai. Because when Summer died Qrow started drinking, and was too immature to take care of Ruby. Therefore Tai, who also loved Summer, raised Ruby.
raven might have the same semblance as qrow i guess >>I would assume.Qrow and Raven are probably twins(they were in the same year of beacon so unless one of them moved forward like Ruby) so it would kinda make sense