Ep. 38: Battle on Christmas Eve

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The six Mermaid Princesses, together with Rihito and Kaito, engage in a final battle with Michel. Seira is finally born, ready to fight with her voice. The Great One turns out to be Rihito and Michal's father; everything is explained, and the Great One destroys the statue that is Michel's true self. After that, Fuku reveals that he was created to control Michel, should anything go wrong; he does so, but the mermaids still sing a powerful song to defeat him. Aqua Regina makes an appearance, and their song gets through to Michel and Michal. The spirits of the original angels appear and invite Michel and Fuku to join them, which they happily accept. In the end, Aqua Regina gives a reborn Michal to Rihito. (Source: Wikipedia)