I focused on showing through their body language how comfortable they are with each other as they converse. The relaxed posture and gazes as they look at each other show a willingness to hear and be heard. And, as in the July 17 sketch, I also show how tired they are, which is what happens when people work hard together on common goals.
On the July 17 sketch I used a gel pen; today I used pencil which was a mistake because it was too faint to reproduce well. The pencil sketch is on a 14 X 17 inch white drawing paper. Using iPhoto I was able to darken it and then import it to Procreate where I added color.