Adella is breifly seen at the beginning and end.
Adella is seen at the beginning to see her niece Melody.
Adella has a more starring role in this film. She is first seen as a seven-year-old girl during the film with her mother. Ten years after Athena's death, Adella is a teenager and highly interested in boys. Adella sees a boy and tries to look cute until Ariel tickles her with seaweed and she gets embarrassed and chases Ariel (this turns friendlier as it goes) and they crash into their sisters. Adella is upset when Ariel was gone for the night, hoping she wasn't hanging out with a boy. At the end of the film, she actually kisses a boy.
- It is possible that Arista is her twin as they were both seventeen in the third film.