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Princess Emeraude is both the sovereign ruler of Cephiro and a Goddess-like figure whom all the inhabitants pray to for peace, prosperity, and protection. She is also the first person to summon Hikaru Shidou, Umi Ryuuzaki, and Fuu Hououji to the mystical, otherworldly realm of Cephiro, to become the legendary Magic Knights.

Source from Wikipeida