Rodoreamon is a gentle, feminine Sibylla from an important family. Everyone addresses her as ojou-sama and treats her with deference. She flies with Eri until Eri leaves to go to the Spring, and has a deep knowledge of sibylla traditions. As children, she and Mamiina met, but were divided by the class difference between them.
On episode 10 she cuts her hair in front of Mamiina before getting in the Simoun.