One interesting plot is the mermaid's longing for the human world. She is fascinated by the things on land and this drives her to make a deal with the sea witch.
Once upon a time, there was a little mermaid named Ariel. She lived in an underwater kingdom. One day, she saw a ship on the surface and a handsome prince on it. Ariel was instantly smitten. She made a deal with the sea witch to get legs so she could be with the prince. But she faced many challenges and difficulties on land. In the end, her love and courage won everyone's heart.
In little mermaid bedtime stories, the little mermaid is the star. She is strong - willed and eager to explore. There are her family members, like her father, the king of the mermaids. He might be strict but also loving. The sea witch is a key character too. She offers the mermaid a chance to change her form but at a great cost. And there could be other sea - faring humans apart from the prince, like sailors who might be seen from afar by the mermaid, adding more mystery and allure to the story of the ocean and the world above it.
The prince is also a main character. He is the one the little mermaid falls in love with after saving him. He is kind but at first doesn't know it was the mermaid who saved him.
One interesting fanfiction could be where Ursula has a change of heart. Maybe she meets a young mermaid who shows her kindness and she starts to question her evil ways. In this story, Ursula might end up helping the mermaids instead of causing trouble.
Another great fanfiction idea could be Lily's encounter with a lost human at sea. Since mermaids are often fascinated by the human world in these stories, Lily might be tempted to help the human get back home. But this would be a difficult task as she has to keep her existence a secret from other humans while also facing the dangers of the open sea.
One interesting aspect is the mermaid's longing for the human world. It shows her curiosity and the allure of a different life. Another is the sacrifice she is willing to make for love.
One interesting fanfiction could be about Elsa from 'Frozen' meeting Ariel from 'The Little Mermaid'. Maybe Elsa uses her powers to create a magical ice path in the ocean for Ariel to swim on. They could exchange stories about their different worlds, Elsa about her snow - covered kingdom and Ariel about her underwater home.
Perhaps there is a story about Ariel's collection of human artifacts. She has a secret grotto filled with all sorts of things she has found from the human world, like forks which she calls 'dinglehoppers'. This shows her unique fascination with human culture.
A plot could be King Triton having to deal with a magical curse that affects all the merfolk's voices. Since voices are so important in the underwater world, this would be a huge crisis. He would have to embark on a journey to find the source of the curse and break it, facing many challenges along the way.
There are the little mermaid who is the protagonist, longing for a different life. Then there's the prince, the object of the mermaid's love. And of course, the sea witch, a rather important character as she makes the mermaid's transformation possible but also creates a lot of trouble for her.