Ayako is a pretty, yet very strong high school girl and girlfriend to Mamoru. She is very well-endowed when it comes to the power of Beatrice, and is considered one of the most powerful Beatrice users in the world, which is why she is sometimes targeted by assassins. Usually, Ayako is a very serious girl, who has been known to never smile around others, however, whenever around Mamoru, she can't help but blush and smile a bit, as she becomes much more shy, and stutters often as well.