Emperor Mapidere is the emperor when Kuni is young. He is the one that made Xana great and conquered all the other islands. He was called Reon? back then and was a strong young warrior. The invention of lifting gas was a "sign" from the gods that Xana would conquer all of Dara and it did. He dies soon after the start of the book and is replaced with Emperor Erishi, his son. His mausoleum took a lot of workers to build and it was part of the reason Huno Krima and Zopa Shigin rebelled.