Character concept

I quite liked the idea of developing the robot character because it has a slight retro look and still incorporates the atom sign. I also like that robots wouldn't drink coffee, and took someones suggestion of that it could be 'powered by coffee' when our class were trying to identify each other's characters/brands. I thought maybe the robot could be wearing a 'backpack' shaped like a nuclear cooling tower, coffee mug or coffee bean packet that powers it.

I messed around with the design a bit with different shapes but I still think I prefer the original design: