It's a good thing Su-jin heightened senses keep him very aware of movement around him. It allows him to keep either of them from walking into anyone or anything as they chat. Seeing Aqua lighting up at learning a few things is definitely pleasant. Not everyone takes joy in learning. Su-jin does, though.

"We certainly can. Reading and telling time are both skills that will make things easier for you." Things being interacting with humans. "Do you like to eat? If we're meeting at noon, we could have a small meal while we're learning. What kinds of things do you enjoy eating?"