She heard Emerald's insult to Yang

Ruby Rose may not have the enhanced hearing like the Faunus but she know when someone is either threatening or insulting someone close to her. Looking behind her sees Emerald and Mercury walking away and for a moment Emerald turns her head toward Mercury and Ruby sees an annoyed look on her.

Turning back to continue with her team's walk around the booths for the festival, a thought came to her: 'So, it was Emerald who just insulted Yang.'

Ruby did a quick side glance at Yang and knew what kind of word Emerald used to insult her: Bimbo. Ruby had to take a deep breath after that coming to that conclusion. Of course that would be the insult anyone would use once they see the figure Yang has along with her confidence.

One of the rare things to make Ruby angry was when someone either threatened or insulted someone close to her and seeing as how Emerald just insulted Yang, someone who is both a big sister and a mother figure to Ruby's whole life, she is going to pay for that.

That just leaves Ruby with one question: How she is going to make Emerald pay?