Sebastian and Flounder would be devastated. Sebastian might lose his sense of purpose as he was always there to guide and protect Ariel to some extent. Flounder, being Ariel's close friend, would likely be inconsolable. He may become more withdrawn and less adventurous. Ursula, if she is still alive in the fanfiction, might have a complex reaction. She could feel a strange sense of victory, but also a tinge of regret as Ariel was a worthy adversary, and without her, the underwater world becomes a bit duller.
Ariel is mostly not a real story. It could be from a fantasy world, a product of someone's creativity. There's no historical or factual basis for it to be considered real.
Ariel is purely a creation of imagination. There's no real-life event or person that it's based on. It's a classic example of a fictional tale designed to capture the hearts and minds of the audience.
It depends on which original story of Ariel you are referring to. In some versions, she might be depicted as having a certain complexion, but it can vary.
Once upon a time, Ariel, the little mermaid, was swimming back to her secret grotto after a day of exploring the ocean. As the sun set and the stars began to twinkle, she found a beautiful, shiny shell. She decided to make it a part of her collection in the grotto. She gently placed it among her other treasures and then curled up on a soft patch of seaweed. She thought about all the wonderful things she had seen that day, like the colorful fish and the mysterious caves. Slowly, her eyes closed as she drifted off to sleep, with the gentle lull of the ocean currents as her bedtime song.