User blog comment:DE-Note/What Determines the Strength of One's Aura?/@comment-7622429-20150529163833

Ièd say that the quantity and quality of an individualès Aura are two separate notions. Jaune was noted by Pyrrha as having a lot. However, we later see that in his fights against Cardin and the Ursa Major that this didn't mean much in the long run, as his was getting low after only a few good blows.

When someone like Pyrrha tells you you have a lot of something, they're probably right. But if that's the case, why didn't Jaune's amount do him as much good as such a comment would imply? Quality. He has the quantity, but not the quality.

I hypothesize that whilst Jaune had a large quantity of Aura, it quickly ran out because he hasn't trained with it, used it more effectively in his lifetime, and thus it doesn't hold up as well against attacks. With this idea, it comes down to two ideas: you can have a lot of Aura, but unless you strengthen it through training, it doesn't protect you from as much damage as you'd like.

Logically speaking, if this hypothesis of mine holds true, then we have quite an interesting case to be made about the nature of Aura itself. In its normal state when unlocked, it isn't a huge amount of protection, even if an individual has large quantities of it naturally. But through training and discipline, it can be exercised and utilized more effectively, becoming more resilient and overall better.