A Japanese animated science fiction space drama Macross Frontier premiered Japan on MBS on April 3, 2008. A main characters of the series there were Alto Saotome, Sheryl Nome and, of course, Ranka Lee (also known as Ranka Mei). Just a character of teenage girl with green hair was selected to representative Macross Frontier in USB gadget.
p.s. More info about Ranka Lee available in wikipedia.