If aliens ever put humanity on trial, the fact that so few of us have played Zone of the Enders will not weigh in our favour. ZOE and its sequel The Second Runner both boast incredible soundtracks; featured here is the ZOE opening theme "Kiss Me Sunlights" as composed and performed by Heart of Air.
Heart of Air also contributed "Blue Flow" to the anime Haibane Renmei (which I love to death). The Heart of Air duo consists of Nanase Hikaru and Itou Masumi. Itou may also be known to anime fans for her work on the soundtracks to Azumanga Daioh, Scrapped Princess and Galaxy Angels, among others.