Luna Shirogane 白金　ルナ

Luna is the perky and bossy fifth-grade class president of Echo Ridge Elementary (Kodama Elementary in the Japanese version). In the beginning of the game and anime, she constantly tries to get Geo to come to school, claiming that it's her job to get him there. When Geo finally comes to school, Luna basically treats Geo like another flunky, but slowly opens up to him, especially after she learns who he is.