Board Thread:Speculation House/@comment-14312167-20140111211806/@comment-24374466-20140527155954

I'm not so sure. Jaune's seems to work in some capacity as a passive thing, you are correct (judging by the healing cut). However, when he gets hit, Pyrrha asks why he didn't use his aura, which implies an active aspect. Similarly, if I'm correct about the shield and damage boost used by Ren, that also appears to require an active aspect. Ultimately, we just don't know enough yet, but my bet is that aura has passive aspects (the enhanced senses, perhaps a weaker shield/healing effect) and active aspects (boosted damage, force field-like effect, active healing).