Board Thread:General Discussion/@comment-26579022-20161015161855/@comment-99.72.96.210-20161114034440

And a direct quote from the Aura wikia page:

"It has been stated that the activation of an Aura requires training and willpower, though someone with considerable training can unlock the Aura of another person. "

So apparently you need tons of willpower to unlock your aura but then can discard all willpower when that's done? Doubtful. But yea, they totally don't have anything to do with each other at all. Nope, not at all.