This is the final speedpainting, around 10 hours of work.
I put the separatist symbol around his chains

My first idea was to do a gorilla inspired face

I changed my mind and I tried something else for the face

I made a really rough sculpt for a 3D blockout

I tried to put ears on the design

And next I search for a nice clothes design

This is my final sketch with an adult human male scale

This is a color attempt.

I changed his facial expression because he had to be unfriendly (but not against) the rebels if he met them.