A female Shiro in a Gantz suit. I did this just to see if I could do a Gantz suit for the Trio pic I have coming up, and it came out pretty good.
I used three reference pics and what I like to call "guessing," mostly on the backside because a majority of the reference pictures I found showed the suit exclusively from the front, and the few I could find that showed the back didn't have it in enough detail for my liking.

I haven't watched or read Gantz at all, so I doubt it's very accurate.