[It certainly comes with an awkwardness - meeting his next life already, who is already a full-grown girl. And a bit depressing, since her very existence is a living reminder of his own mortality. But it's been a long time since he's first met Korra, so some of that has been coped with to an extent. So he's able to reply casually.]

Yep! She's Water Tribe alright. She's just away on a mission right now, but I can introduce you some other time.

But there really is! A bunch of people from our world did go back home a bunch of months ago, but then more kept coming back! [Iroh himself had been here once before during Aang's stay, but Aang took it as a given that this Iroh did not remember that.] Most of my friends from home are all here.