Board Thread:Speculation House/@comment-9962367-20130726233702/@comment-4830106-20131018215422

You know, I think I've finally hit on it: Jaune and Ruby have a filial (brother/sister) relationship. They're closer to each other than to some other characters, but no romantic vibes. I bet the sense that Jaune is an only child* and we're pretty sure Ruby doesn't have a brother. So, While Jaune will probably ship with Pyrrha, he'll look at Ruby as his quirkly adoptive little sister.

(*Granted, we haven't really covered any character families in depth, so we don't know, and technically, Ruby and Yang are only children as well.)