Back in the Jarvis AMA, there is a short intro to the Tessellation board and if you watch carefully in the lower right corner you can see the face of the person manipulating the tiles. It appears to be a man with big round glasses and a receding hairline.
I grabbed a screenshot, rotated it, and tried to enhance the colors a little to give a better view.
Maybe a former researcher?
Or someone that wasn't supposed to be seen in a reflection?