Nice... I love RWBY. I was thinking about making an RPG based on the show a couple of months ago.
I always try to include ideas for how stories are told in a game, and the types of stories that might occur. In RWBY I'd look at the episodic nature of the show, and how storylines can be concluded in a single show (or session), and how other stories might carry across a season (or campaign). This would include introducing enemies (or other supporting characters) that reveal things about the character's backstories, and the way the understanding of "dust" varies depending on the character's background.