I chose Sailor Cosmos, from the Sailor Moon Manga (Japanese comic book). She only shows up momentarily, but I loved her design. Also the year 2011 is the 20th anniversary of the series, and that is pretty awesome. Official Japanese 20th anniversary website
I have yet to get some really good professional pictures done of the costume, but I intend to later and will post them up here. I also may be tweaking some of the details on it, as I have since learned new and better ways to accomplish the look I wanted.
This is the original art by the author Naoko Takeuchi.
And here is my quick concept art with notes sketch of how to pull this off: