ユーミ・オーリエット

 She is actually Kouki's old childhood friend, 星原 美由紀 / Hoshihara Miyuki who gained immortality as side effect after she picked up Mother Stone broken piece and slowly fuse in her body later. With the passage of time and living alone for a long time she was corrupted by Mother Stone and ended up going crazy doing inhuman acts without a doubt and only to "spend her free time"'. Her actual magic is not attack type but brainwash using light particle. With it she hide from other doubt about her youth appearance. In some time she become queen and show or hide her identity on a whim. Later she can reincarnate properly after Mother Stone in her body destroyed by Kouki and Akina./