Who is Zachi from Persian Letters. Translated with an Introd. and Notes, by C. J. Betts and what is their importance?

Zachi is one of Usbek's five wives. While Usbek is traveling in Europe, Zachi is discovered in bed with a white eunuch, one of her slaves. In one of her letters, she begs her husband to return to love her again or so that she can die at his feet. Zachi believed that the fact she was loved by Usbek afforded her precedence in the seraglio.