Mitsuki Kouyama (高山 満月 kōuyamā mitsūkī) is a 12 year old girl and she wants to be a singer, but because her throat got her a pain. and Mitsuki wants to transform to become a 16 year old and so she sing for her feelings. And her childhood friend eichi to make her own promises. And she give her feelings with the angel's feather become the moon mermaid princess given by aqua regina.


  • Mitsuki's theme color is yellow-green and her sub color is light pink.