Who is Akoya from The Master Puppeteer and what is their importance?

Akoya is a fictional courtesan in one of the plays at the theater. She is hiding her lover from enemy soldiers, who come to her home and tell her to play three instruments. They think that if she can do so perfectly, then she cannot be lying. She plays the instruments beautifully, and the head soldier decides that such pure music could not be played by a liar. Jiro manipulates the feet of Akoya in this scene at the end of the book.