"...probably not as important as figuring out your reincarnation situation - or maybe you do all fall into the Abyss like orcs who don't fight, I don't have any way of telling from here, I suppose!
But yes, the unique thing about the human spirit is that it can spontaneously create auras under the right circumstances, but those circumstances involve being really intensely Virtuous - if your world is mostly tamed, that might be significantly more difficult, the very few that do it without training tend to do so in situations of extreme adversity. I wish I could say 'right, I'll just become a Paragon then' but I am not, actually, even sufficiently good at Pride to think that is likely to happen. I think the best approach there is probably to - relate the tales of the Paragons and Exemplars and the Virtues to some of your people who are already very good at either going out and doing things or intentionally inducing unusually intense states of mind in themselves, and see if we can get anywhere like that.
Which won't work if you do have different souls - or no souls at all, I suppose, although I'd be very surprised. I did initially think you might all be Heralds - magical creatures that can do most of the things ensouled beings can, but are made of magic instead of animated by a soul - but unless I have transited bodily into the Realms..."
Oh. That is. That is not a great thought. It is perfectly consistent with everything that this is a particularly bizarre corner of the Day or Autumn Realm, especially Day, somewhere artificially maintained with a dead magical signature. Or that she lost her skills when - when she became a copy - a Herald - a creature without a soul...
To the volunteer, it looks like she has been struck by some kind of horrific realisation and just... stopped.