Ryohai

Ryohai was the last Emperor of the Federation of Mugen.

The Third Poppy War
Ryohai acceded the throne of Mugen after the death of his father. He was young, hotheaded, and violently nationalist, and was a leading member of Mugen's war party.

Although many believe he will soon declare war on Nikara, Ryohai and Empress Su Daji reach a peace agreement at first, though she sends The Cike to kill the young emperor, which fails. Some time later, negotiations break down, and the Third Poppy War begins.