User blog comment:Gundam Legilis/Destiny In Depth/@comment-26512661-20160111010333/@comment-4010415-20160111011524

I dunno if Ruby actually figured it out, to be honest. I think she just felt like it was kind of weird that two people saw something that wasn't real while Mercury was involved in a fight. But then, she brushed it off and went to the colosseum to see if Pyrrha was gonna be selected for that night's fight. Then, she saw Emerald, remembered hearing that Mercury and his team went back to Haven, and realized something wasn't right.