[ ...he's playing leap frog instead of swimming, but that's something, isn't it? Yachi kicks her way over, keeping well above that coral and she handhovers for a moment trying to figure out how to word this- ]

-—I'm back! [ she announces first, having been treading water in front of 9S's face for at least a few seconds already, but just in case he didn't hear her... ]

You were able to go pretty far! But there's coral at your feet- you'll get cut on them if you're not careful, so it might be better to practice over the sand.

[ Thick, soft sand that's impossible for anybody to walk on, whether it's under or above water. ]