Oh, dear, where do I begin...
Well, I have lots of stuff, but I think they are not that important. Let's find the most important stuff.
Average height ... He has brown eyes, long straight hair, a thick moustache and a short beard. His hair and facial hair have turned a grayish white from age.
His lower legs have been replaced by robotic prosthetics, black muscles over gleaming chrome-like metal.
...
He wears light brown trousers, a red shirt, a dark brown waistcoat and a cowboy hat.
...
So, basically a stereotypical cowboy with robot legs.
He is inside Gilgamesh the mobility battlesuit, a bulky and heavily armoured exoskeleton (although not as bulky and armoured as the standard model).
...
On the battlesuit’s “head”, where one would expect the eyes to be (the upper part of the torso, since battlesuits lack heads), are two black unblinking orbs, a pair of cameyes. On its back are two giant rocket pods that allow it to fly.
...
Something that looks like a black laser rifle the size of a man has fused with his battlesuit's arm. It's a long, smoothed, black object, almost like a laser rifle but with the corners smoothed and much larger and longer. It is split down the middle, revealing its silver innards and wires that connect to the battlesuit and interface with its systems. The weapon has a giant, partially enclosed grip and trigger at the back and a dial on the side just before the grip. The dial has no writing or numbers or anything; it just has faintly glowing coloured sections that it can click between. Red, orange, yellow Green, blue, indigo and Violet. It also has a No Colour setting. Choosing a colour causes the rifle to reshape and start glowing with that colour. It also causes the battlesuit's HUD to change colour and a pictogram related to the function of the weapon to appear in it.
...
So basically a headless giant robot with two rockets and a black squarish thing fused with one arm.
I'll see if I can find some images.