@MapleTreeWithAGun She's actually really lucky that Ernon is living so isolated and prisoner like life. If the mage had seen the world a lot, anything Kasia could have said or had left unsaid might have been dangerous. Her backstory is that of a wandering mercenary, but unfortunately she hasn't really seen anything. I'm sure she has looked at some maps and might remember town and location names, but that's it. If Ernon had asked her to describe the places she has visited, it would have been extremely challenging and tricky.
@Kaarme it depends on the extent of this world, are we on something like a little continent like Australia or is it more like the european/asian one where she could say she is from the far whatever, but yeah, it would be dangerous if he would have been traveling a lot himself
@MapleTreeWithAGun the problem with her earth memories is that she probably didn't really see much either, besides a lot of military bases, she was raised as a human weapon so she was likely on a short leash (and didn't care about too, so her statement was quite true)