.. This is rough. Because Inigo can see the slight difference here that confused him so much to begin with. But it's hard to point out said difference without giving away just a bit more about his situation than he'd like to. He doesn't want people to know how hard he had it. Gladio's smile is so nice! It shouldn't disappear for a second just because Inigo's had a crappy life.

"We travel around in tents back home." Maybe he can just make it seem like it's some voluntary nomadic lifestyle rather than a literal apocalyptic hellscape... "So I suppose I've never really thought about it as some special activity? To me it's always been.. just the way things were. If that makes sense? When I think of home, I don't really think of a building the way most people might."