Wonder Girl is the name of three fictional characters featured as superheroes in comic books and other media produced by DC Comics. The original was a younger version of Wonder Woman. The second and third are protégés of Wonder Woman, and members of different incarnations of the Teen Titans.
I really like what you've done with the costume- while retaining elements of the original Wonder Woman, it looks suitable for a 'young' character, and the design of the eagle and patterning on the shirt looks slightly South American. The pose is stong, and her face looks like she's ready to take on anything, and I like the subtlety of the background- it enhances the picture without being distracting.
This design is amazing! It takes the original costume, which I never liked much, and makes it really sweet and cool. Love it. A lot of personality to it, too.