Here where a few designs I did in my sketchbook for my protagonist. I feel that the outcome is what I wanted to achieve- a friendly, helpful looking robot.
When I was going through the process of making my protagonist, I decided to change joints on the arms. They didn't look quite right so changed it to be looking straight at them which I think works much better.  
Protagonist
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Protagonist

Designs and sketches for my main protagonist.
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Creative Fields