Interesting design. Reminds me a lot of Gizmoduck from Duck Tales. Might want to be more careful because of the whole original character aspect of the challenge.
In my opinion the red could be a bit more vibrant. Right now it feels sort of flat. Also your character has edge wear, but no battle damage or dirt on him. It is hard to imagine how he would get one without the other. You might want to add some bolts or screws here and there. It will make him feel more like a thing that was build from different parts, rather than cast from molten iron. Some more details on the front of the upper body could be good too, vents or panels or something like that. Just to break apart the monotony.
While all of the above might sound negative, i quite like the character idea. It is enjoyable to see something different. We have a lot of beautiful female characters, but not that many male, non human beings in this art war.
Keep up the good work 
