I'm not sure who Ariel is in this context without more information. It could be a unique character created specifically for this 'never - ending story' that has its own set of characteristics and a role within the plot.
Ariel could be any character created by the fanfic author. It might be a mermaid, as the name Ariel is often associated with mermaids in popular culture.
In the original story, the mermaid's ending is tragic as she turns into sea foam, while in the Disney version, Ariel gets a happy ending and marries the prince. Also, in the original, she is mute on land due to the deal with the sea witch, but in Disney's, she regains her voice. The original mermaid is more about self - sacrifice and unrequited love, while the Disney one is more of a fairytale romance.
In the Disney version, Ariel gets her happy ending with the prince. But in the real story, she doesn't. In the real one, she suffers a lot more, like walking on knives with her new legs. Also, in the real story, the prince marries another girl and the mermaid turns into sea foam.
The Disney version of the Little Mermaid is more of a fairy - tale romance. Ariel is a spunky and adventurous mermaid who gets her prince in the end. However, in the real story, the mermaid's journey is much more tragic. She suffers a great deal. For example, she experiences extreme pain while walking on land with her new legs. Also, the prince doesn't fall in love with her as she hoped, and she ends up sacrificing herself instead of getting married to the prince like in the Disney story.
One key difference is the ending. In the Disney version, Ariel gets to marry the prince and they live happily ever after. But in the real story, she doesn't get the prince and turns into sea foam. Also, in the real story, the pain she endures on land is much more severe than what is shown in Disney's adaptation.
In the Disney version, Ariel gets her happy ending with the prince. But in the real story, she doesn't. In the real one, she turns into sea foam. Also, the Disney version is more upbeat and focuses more on the adventure and romance. The real story has a darker tone, emphasizing her sacrifices and the tragic end of her love.
There could be a male Ariel fanfiction where he teams up with other Disney male characters from different stories. For example, he could go on a quest with Aladdin to find a magical item that can save both their kingdoms. This would combine the elements of two different Disney universes and create an interesting story line.