Cresiana IX (Cresian: Cresiana IX) was the empress of the Cresia during the Cresian unification. During her reign, all traditionally Cresian-speaking lands were unified under the Cresian Empire. Cresiana IX was the last queen and the first empress of Cresia. Before the unification, Cresia was known as the Kingdom of Cresia. Once the unification was complete, Cresiana IX proclaimed the Cresian Empire. She crowned herself empress and posthumously declared all previous kings as emperors.