How does Sara become a child in Mermaid Melody? - Anime & Manga

I watched this anime when I was in grade 4. I still can't see why Sara (the orange mermaid) becomes a child.

Pichi Pichi Pitch Stickers by Valentin Cazet

Sara, Mermaid melody Wiki

Selena's Teen Book Talk - Pichi Pichi Pitch Vol 1: Mermaid Melody by Pink Hanamori

GO AWAY FROM HIM!! by Evergreen24Artist on DeviantArt Mermaid melody, Anime mermaid, Mermaid melody pichi pichi pitch

Mermaid Melody Pichi Pichi Pitch' x 'Yokohama Hakkeijima Sea Paradise' collaboration campaign! - Japan Culture Guide

Mermaid Melody Pichi Pichi Pitch Mermaid Princesses / Characters - TV Tropes

Mermaid Melody: Pichi Pichi Pitch (2003) - Plex

Sara

Mermaid melody part of your world amv

Sara, Wiki