[oh, he knows that already? surprise shows momentarily on prompto's face, before he's nodding to confirm what v heard.]

Yeah. Not just that, though.

[he puts his hand forward, somewhere in the space between the two of them]

Physical contact between any of us will cause our chests to glow. But, uh, [here he pulls back his hand a bit, fingers curling inwards] there's also a kind of emphatic communication... Shared emotions, mostly.