How does Sara become a child in Mermaid Melody?


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

![Sara](https://i.stack.imgur.com/LBbkZ.jpg)

![other mermaids](https://i.stack.imgur.com/SfcpKl.jpg)




Sara had lost her memories but the few fragments of her former self who loved
Masahiro created a body. So the child form of Sara is the feeling she had for
Masahiro.

