She debuted in 1999 as the singer of the opening and ending themes to Key's visual novel Kanon.
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She later became a guest vocalist for I've Sound and appeared at the Nippon Budokan on October 15, 2005 at the I've concert "I've in Budokan 2005: Open the Birth Gate", where she sang two songs: a remix version of "Verge" and the normal version of "Last regrets".
Akira Ohashi as Irys - The show's main kaiju antagonist, Irys is a creature that must feed on bodily fluids to survive, and forms a spiritual bond with Ayana, using her hatred for Gamera to feed his strength.
Tirebolu itself is a small town of 14,303 people located on the hill named Ayana which rises from the Black Sea shore just to the west of the Harşit River estuary.