It’s already a really solid design. I wouldn’t change too much. I think if you shade her like your other designs and give her skin that robotic/metallic effect, that alone would be enough to push her into the realm of the more super-heroic. I think it might be a cool effect to have her look just completely like a classic 50’s starlet who just happens to have glorious golden skin! Sort of an ordinary/extra-ordinary juxtaposition thing.
You could always add a pop of color or a pattern texture to her garments to give it some more flair, like on her belt or the bow on her neckline.