User blog comment:Deafro/Are Hunters Immortal?/@comment-9058532-20131208151559

I highly doubt that they are immortal, when Jaune healed himself Pyrrha was happily surprises and said 'you have a lot of it' so Jaune is special in that regard that his aura can heal so well. Aura can drain and regain like a force field/shield in most video games as shown when Jaune was fighting Carden and re saw the Aura meter. So like the he said, Aura acts as a shield and when you run out you are very vernerable like a normal human. So in that time span we can assume that is when you would go in for the kill. As for healing that may be for minor damage, but I would not assume at this point that it could heal internal damage if you got a sword stuck through you.

So I think is a shield more than anything, and it can be worn down. As for the healing effect of it I don't think it could be so minor. If hunters lived forever why would they be training multiple schools? Plus being immortal would just suck, living forever would get very boring and lonely.