[Neus]

You can use it on players and it will give a message saying they were captured. So, purely a roleplaying thing.

EDIT: Can we expect a Kaelensian-related psuedo-God to Pray to (something like "Ancestors" since that's literally the closest thing they have to one and covers all of them outside of Phenex which already have their own) or will they not be given one?

I'm not sure. I didn't have any plans to but I'm not opposed to it either.