Board Thread:Speculation House/@comment-16348034-20130823234203/@comment-23784953-20130824005947

...I just realized. If put in gameplay terms.

Aura is like the class a character has.

Yang's a brawler, giving her raw power as her Aura. Ruby's... something, which gives her speed. Ren is a monk, balancing both offense and defense. Jaune is a knight/sentinel, which grants him pure defense.