石田亜佑美 (Ishida Ayumi) is a Japanese pop singer and dancer under Hello! Project as a 10th generation member and sub-leader of Morning Musume., as well as a former member of the SATOYAMA & SATOUMI movement units Harvest and HI-FIN. Before joining Hello! Project, Ishida was a member of the local idol group B♭ and a back-up dancer for Dorothy Little Happy.