Kaworu pauses without dropping his smile, then raises his gaze--or breaks it with Jowan, anyway--to make eye contact with the smiling neighbour, who did not walk towards them so much as he simply... was there now, where he wasn't before. It's like he'd teleported in the moments during which no one's eyes were on him.

"Yes." Then, in nearly the same friendly tone that he'd declared himself lost:

"Hello!"

Kaworu can't feel him at all--not the way he can 'feel' Jowan's presence, the invisible barrier of his AT Field in contact with Kaworu's. Similarly absent are the slight, ambient movements of living things--breathing, shifting, blinking.

Interesting.

Though if Jowan was hoping someone else would confirm this experience as weird, though, he's going to be terribly disappointed.