Board Thread:Episode Discussion/@comment-14138255-20161211174540/@comment-173.172.191.195-20161216192805

I personally believe that the activation of Aura, like the activation of Nen in Hunter X Hunter, is gradual for most trained warriors as they go through life and survive battle after battle. It explains why people like Blake, Nora, Ren, and Torchwick were able to progress as fighters despite not training at an academy for most of their lives (don't know about Ren and Nora, but it may be the case). Someone else unlocking it is probably a method of last resort/convenience if the recipient actually needs it at the time.