[Wanderer...not really a name as far as he's concerned, but if that's what he wants to go by now, then fine. Childe doesn't really say much on it, but it will be a little hard to switch to that since he's so used to calling him by his Fatui name. But whatever.]

Like I said, you're overthinking this, or taking it far too literally. Listen, this is all I'll say on the matter for the time being. If you can feel it here, [he says, gesturing to where a heart would have been in Wanderer's chest if he had one,] then you've got a heart. An abstract concept of such, but it's still a heart nonetheless.

[This gooey mushy talk is boring him, so he sighs as he puts both hands behind his head.]

I never would have thought this would be something important to you, Wanderer. But it makes sense. But I hope you'll be able to feel the thrill of battle once we clash head on. I can't wait.