The Rogue is basically a recolor of the Shaldoll normal unit variant, the only difference being the colors, the faceplate, the battleaxe, and the gun hand. But even with these "minor" changes, it's become a much cooler unit already. As you can see in the first pic, you have an option to use four weapons: the cannon hand, the axe (impleid for left hand, as there are gaps that suggest it), the shield and the one saber from the backpack.
The shoulder armor tends to lie flat to the shoulder mount, so it's relatively easy to keep the shoulder armor stable. Also: The shoulder armor design somehow reminds me of Front Mission 3.