Board Thread:Speculation House/@comment-10380701-20140808014446/@comment-3257939-20140808072826

Remember that Yang broke Junior's weapon. That was because the strength of her weapon increased by her aura was enough to break Junior's. It's very simple, aura has a level depending on each person and how she/he trains it. For example, Jaune has a lot of aura and that's why he was able to survive some heavy strikes despite not having any training with aura and just naturally taking damage.

Penny's sword was sharp and strong enough to defeat the White Fang goons. There is no need to put some aura into the weapon against enemies that weak.