[@OneWayOut] I just realised something actually. I've been re-watching RWBY whilst sorting this out and I've realised that your aura draining ability might unbalance things quite a bit more than I previously thought. Mainly because aura is used to determine whether or not a person can remain in a fight. So as it stands all your character would have to do is touch the enemy and they'd essentially be able to win the match rendering all blocking methods useless.

Perhaps instead of any form of contact being able to drain the victim you have to make physical contact with the person in question. Not merely their weapons, so that way you can still use your ability, but its just a little bit more balanced.