Right, but I'm talking about whether or not every spirit that shows up in Bastion MUST become a Kyrian or not. In Revendreth it is offered as a choice: once you repent, do you want to move on or become a Venthyr to help other people go through the same process?
I don't think it's been mentioned if EVERY soul sent to Bastion MUST become a Kyrian or not. If it actually is the only Light afterlife then it would be rather shitty if the choice is forced, but if they just say it's a place you go if you want to continue serving the light it makes some sense.
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So far dying in Revendreth shows a classic Spirit Healer model but it might be placeholder.