Thanks! At first I also wondered if it was just an NPC following me around, but then I noticed some behavior that didn't feel quite like AI. At first I was a bit frustrated that I couldn't communicate with him, but it grew on me.

The graphics were based on some templates from freepik.com. Their subscription is extremely cheap ($8 a month, I think), and you can download tons of vectors each day (30 or so) to use and modify as you please. I can't live without it for a few months now :)