Arista

Ariel's sister Arista. I'm not a hundred percent sure, but from the episodes I saw of The Little Mermaid tv series, it seemed as if Arista was the sister Ariel was closest to.
(BTW, does anyone know if I can get those on video or dvd? are they setill playing on tv?)
Arista c. Disney

The sisters:
Aquata: [link]
Andrina: [link]
Atina: [link]
Adella: [link]
Alana: [link]
Ariel: [link]

King Triton: [link]