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

Rica travels with Usbek to Europes, and unlike Usbek, he truly enjoys his trip out of Persia. When Usbek suggests they return home, Rica discourages the idea. He finds great enjoyment in learning about European culture and meeting new people. Rica authored nearly fifty of the letters included in the novel.