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.

Sara, Mermaid melody Wiki

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

Mermaid Melody Pichi Pichi Pitch, Ariel, mermaid, Chibi, fairy, manga, fantasy, violet, legendary Creature, anime

mermaid melody - anime & manga 4 ever

Pichi Pichi Pitch Stickers by Valentin Cazet

Sara, Mermaid melody Wiki

PANTONE 00s Anime - Pichi Pichi Pitch Baby One-Piece for Sale by PeachPantone

Mermaid Melody Coloring Pages Printable for Free Download

Mermaid Melody Pichi Pichi Pitch Noel Idol Form Cosplay Shoes Boots, Anime Cosplay Boots – FM-Anime Cosplay Shop

Mermaid Melody Magical: Hanon Hosho (my favourite mermaid!!!)

List of Mermaid Melody Pichi Pichi Pitch episodes - Wikipedia

Seira, Mermaid melody Wiki

Mermaid Melody: Pichi Pichi Pitch (TV) - Anime News Network