Princess Adella is a minor character in The Little Mermaid. She is King Triton and Queen Athena's third daughter, one of Ariel's sisters, one of Eric's sisters-in-law, and one of Melody's aunts.
Adella is the only sister of Ariel to have a boyfriend, as referred in The Little Mermaid: Ariel's Beginning; at the ending, she kisses a merman named Stevie.
She is voiced by Sherry Lynn in the original Little Mermaid film, by Kath Soucie in the related TV series and by Tara Strong in The Little Mermaid: Ariel's Beginning.
Adella is the daughter of King Triton and Queen Athena.
She has a chartreuse yellow tail and wears a chartreuse green seashell bikini top. She has teal eyes and her dark brown hair is tied in a ponytail with a pearly hairband and headpiece that both match the colour of her tail.
Her appearance varies slightly in the TV series, where she wears a grey hairband and is animated to be somewhat heavier than her sisters. However, in both the original (aside from one brief moment in the "Daughters of Triton" song), prequel films, and the coloring pages, she has the exact same figure as her sisters. The prequel film establishes that Adella is crazy, often dreaming about unicorns and flirting with them.
In extension media released from 1989 onwards, she is the fifth daughter of King Triton. However, bonus features from the DVD release of the prequel state that Adella is the third of Triton's daughters.
The Little Mermaid
Adella appears at the beginning of the film, where she is performing the song "Daughters of Triton" alongside her other sisters. She also appears during the song "She's in Love" sung with the other mersisters and Flounder. Afterwards, she only has cameo appearances alongside her other siblings.
The Little Mermaid (TV series)
Most of Adella's appearances are cameos alongside her other sisters. In the episode "Trident True", she is the victim of a practical joke courtesy by Urchin. When she tries to comb her hair, she ends up having a bad hair day because Urchin exchanged the comb for a combfish. First the fish digged up Adella's hair then wrapped it. After that her hair turned into a haystack. At the end of the episode, she presents Triton with a father's day present, and it is implied that she gives him the same thing every year.
The Little Mermaid II: Return to the Sea
Like the rest of her sisters (with the obvious exception of Ariel) the only time she appears is during Melody's ill-fated christening.
The Little Mermaid: Ariel's Beginning
Adella's first appearance in the film is as a young girl. She is relaxing in a cove alongside her sisters and parents, but is forced to flee when pirates attack. Adella's mother, Athena, is killed in the attack, which devastates the family. As a result of his grief, Triton bans music (Athena was a noted lover of music), and has Adella and her sisters be strictly raised by their governess Marina Del Rey.
As a teenager, Adella learns from Ariel about a secret underground club called The Catfish Club and starts dancing with a fat male sea slug. She secretly attends alongside of them, but is caught by Marina and punished by Triton. At the end of the film, after music is restored to Atlantica, Adella is seen kissing Stevie.