Episode 51 of Mermaid Melody Pichi Pichi Pitch , titled (or "The Resurrection of Light"), serves as the climactic finale of the first season . It concludes the war against Gaito and resolves the season-long arc of the Mermaid Princesses. Episode Summary

The episode ends on a bittersweet note: Kaito finally learns Lucia’s true identity as the mermaid who saved him years ago, fulfilling their romantic arc for the season, while the princesses return to their respective kingdoms to begin the rebuilding process. Key Highlights

: This is the first time all seven Mermaid Princesses (Lucia, Hanon, Rina, Karen, Noel, Coco, and Sara) perform together.

: For a granular, beat-by-beat breakdown of the plot and character motivations, the Mermaid Melody Wiki is the most comprehensive resource.

: The long-awaited reveal happens when Lucia transforms in front of Kaito to save him, breaking the "curse" that would have turned her into sea foam because she didn't technically tell him herself—he saw it.