石田 燿子

Yoko Ishida (born October 7, 1973 in Niigata, Japan) is a Japanese singer. She is known for having performed theme songs for anime shows such as Prétear, Ai Yori Aoshi, the Ah! My Goddess TV series and the Strike Witches series, as well as for having sung for the Para Para Max CD series. She currently works under Solid Vox. Formerly she was employed by Hyper Voice Managements.

NANA Wikipedia page: link

Her alias YOKO (capital letters) should not be confused with Ueno Yoko's alias "Yoko" (sometimes yoko)