User blog comment:NeoAX/Jaune, greatest warrior at Beacon? + Aura Theory/@comment-66.227.143.86-20130830013927

Maybe Jaun's Aura was too much for him and it was locked or something? Or it only triggers when in danger like you said above. But if that was the case I don't see why his Family or someone at one of the school's couldn't unlock it for him like Pyrrha did. I was reminded of Gohan too as Jaun was flung through the air by that Grimm thinking "Maybe it'll be like that time Gohan got thrown at that giant boulder and he'll use is Aura on reflex and blow the crap out of something!"