I got this idea a while back for displaying emotions.
Basically the idea is that the helmet has sea through LEDs like the ones in the image below, and basically the idea is that there is a camera inside the helmet that scans the Drood's face and displays the corresponding emotion on the helmet display. I explained it really badly but I think the images can show what I mean better.
The inspiration:
First idea, full face, doesn't look right to me tbh so didn't go as far:
Second Idea, Eyes only, looks so much better imo:
Just an idea I wanted to throw out there
Yes