Romy

A mermaid is a character from Barbie and The Secret Door.

Physical Appearance
She has strawberry blonde hair in down ponytail hairstyle and brown eyes. Her dress is blue and purple.

Trivia

 * In the teaser trailer, she used the same ponytail hairstyle as Mariposa from the sequel and Sandrine from the previous movie.
 * In the movie trailer, She used the same character models of Taylor from Barbie: A Fairy Secret and Hadley from the sequel.