Considering this is probably a woman, I think it's possible
Ayako Shinohara is her maiden name, since they're both artists for WAVE MASTER albums. Although Okahara
debuts a couple months before Shinohara's last appearances in October 2005. Also, the kanji given in the Sakatsuku notes gives her name as 亜
哉子, not 亜
矢子, though perhaps that's a mistake (either on the album itself or in the notes. I haven't seen the booklet myself).