This is Captain Flax of the 103rd ESC Battalion.
If you're wondering what ESC stands for, it's European Space Coalition.
And this guy means business. After leading blazing attacks on dastardly minions of evil on every planet known to humankind, he looks a bit worn and weary. He wears standard issue officer's dress, with newer modified body armor plating. He carries a light automatic ion assault rifle and an armor-penetration cannon, which rests on a folding tripod.
This was my favorite of the character sketches and the most fun. I enjoyed finding references for the clothes, which were inspired by WWI and II battle uniforms.