User blog comment:Varzan Deodinm Beldinm/Overpoweredness and the Tension: Should we Care?/@comment-3257939-20140825052232/@comment-2006510-20140825062438

And an instant berserk button to having her hair taken out lol

But seriously, Yang's a big sister and surrogate mom to Ruby - the latter's not really too obvious, but it is there. First saying she was special, then doing a sink-or-swim mentor thing to force Ruby to socialize (because she knows having none isn't a good thing), and otherwise being really worried for her sister - the hints are all there