Bang
Bang is a shorter than average stocky man.  Well corded arms and a thick body set lead one to think he is not a "little guy".  Calloused hands and thick stubble are the best way to describe him, as he is a rough man who constantly is looking for targets.  Not just alien targets, he likes to find structural ones as well.

He was a troubled kid who blew things up and was always sneaking around.   After his last three years on and off in juvenile detention, he enlisted in the military and received more extensive training in demolitions.  He has been in UEC military for a 4 year stint and had gotten out working on a bomb squad for a metropolitan police force.  It was then that the war started and he helped his local law enforcement until all chaos had broken out.  Now he is a freedom fighter and reenlisted.