The author of the playbook "Ratnavali" is Harsha Vardhan. "Ratnavali" is a Sanskrit drama about a beautiful princess named Ratnavali, and a great king named Udayana. It is attributed to the Indian emperor Harsha Vardhan (606–648). It is a Natika in four acts. It's like a comedian drama. This drama have twelve characters. But Udayana & Ratnavali are the main characters in this drama.