While she didn’t have much time on the show, I liked this incarnation of Ariel, the Little Mermaid.
Her backstory is pretty much the same as it always is. She’s a mermaid, Eric is a prince she falls in love with, and a lot of mermaid-human drama. She ends up getting tricked by Regina and loses her voice.
But when Regina needs her help in the fight against Peter Pan, she agrees as Regina gives her a chance to get back to Prince Eric. But she first helps Belle on a quest.
After the whole Pan ordeal, Eric goes missing. I don’t remember much after that, but I do recall her reuniting with him.