On September 17, Ishii was introduced alongside the other four Engeki Joshibu audition winners on Hello! Project Station.
On June 29, Ishii suddenly deleted her Twitter account and all the entries on her Ameba blog.
From June 1 to June 17, she starred in Pharaoh no Haka ~Hebi Ou Sneferu~. Afterwards, Ishii never participated in any other Engeki Joshibu production, and had presumably left the club.
-  Rhythmic Town (リズミックタウン)
-  SMILE FANTASY!
-  TRIANGLE
-  Thank You Very Berry
-  Kizetsu Suru Hodo Aishiteru!
-  Zoku 11nin Iru! Higashi no Chihei, Nishi no Towa
-  Hiiro no Kokuin (緋色の刻印)
-  Pharaoh no Haka
-  Yumemiru Television
-  Ichimai no Ticket ~Beatles ga Yattekuru~
-  Pharaoh no Haka ~Hebi Ou Sneferu~