The child-like operative in charge of Operation "Silver Wild Grapevine". She had been studying Aika and had learned how Aika fights. Aika was tricked into a pilot adaptability physical examination, whereby Rie gathers physical data on Aika. After her connections to the Delmos were revealed, rather than escaping, Rie proceeded to continue gathering Aika's battle data by sending her underlings against her and then taping the entire battle. (Source : anidb)