Drawing mech type stuff has never been my specialty...but I thought I would give it a shot anyway.... I've been playing too much Mass Effect OTL
Its an OC type thing...I won't say much more. I have a thing against making OC's for games/movies :/ So we will leave it at that.
The thing in 'his' hand is a breather gas mask, he/she/it/whatever usually wears a full hood think Kasumi style
and armor suit.
Paint tool Sai - Edits and touch ups in CS3