Well, perhaps Naruto discovers he has mermaid-like abilities. He could swim super fast underwater, communicate with sea creatures, and use his unique ninja skills in an underwater world. Maybe he has to protect the mermaid kingdom from some underwater villains.
First, do your research on both Naruto's world and mermaid lore. Know the characters, the ninja techniques in Naruto, and the characteristics of mermaids. Then, create a unique plot. For example, combine the idea of chakra with mermaid magic. Make sure your characters are well - developed. If you have a mermaid character, give her a distinct personality, goals, and backstory. Also, keep the Naruto - style action and adventure in the story. Have exciting battles and quests.
Another storyline could be a mermaid who is in love with Naruto. However, there are obstacles because she is from a different world. She has to figure out a way to be with him, and in the process, she uses her mermaid magic to protect the village from an underwater threat that is also affecting the land. This could create a unique bond between her and the villagers.
Sasuke could be one of the main characters. He might be initially skeptical or even hostile towards Naruto's mermaid side, but as the story unfolds, he could come to understand and support Naruto. Another character could be Sakura. She could use her medical ninjutsu skills to help Naruto if he gets injured during his underwater adventures.
For a 'Little Mermaid Naruto fanfic', Naruto and Ariel are the primary ones. However, Gaara could be an interesting addition. His past of being an outcast could parallel Ariel's feeling of not fully belonging in her own world sometimes. Then we have Ursula, the sea witch from the Little Mermaid story. In this fanfic, she could be a powerful enemy who wants to use Naruto's chakra for her own evil purposes. And Hinata could be another character, her shy nature contrasting with Ariel's more adventurous spirit as they both interact with Naruto in this unique crossover.
One possible plot could be that the Little Mermaid, Ariel, somehow ends up in the Naruto world. Maybe she's washed ashore in the Land of Waves. Naruto, being the kind - hearted person he is, tries to help her. She could use her mermaid abilities like communicating with sea creatures to help Naruto and his friends in their battles against the likes of Zabuza. The cultural shock between the two different worlds could also be an interesting aspect to explore, like how Ariel reacts to ninja techniques.
A mermaid named Nami could be one of the main characters. She might be a curious and adventurous mermaid who is the first to approach Naruto. Another could be Marina, a more reserved mermaid but with great wisdom. She could act as a sort of advisor to Naruto within the mermaid world.
One great mermaid Naruto fanfiction is 'Naruto: The Mermaid's Quest'. In this story, Naruto discovers a hidden mermaid village and has to help them protect their secret from various threats in the ninja world. It combines the magical elements of mermaids with the action - packed Naruto universe really well.
I'm not sure if there is a specific 'Cannibal Mermaid Hamilton Fanfic' out there. There are so many fanfics in the world that it could exist, but it's not a common or mainstream type of fanfic. You might have to do a very deep search on various fanfic platforms to find it, if it exists at all.
Well, 'captured mermaid fanfic' likely involves a mermaid that has been taken captive. It could be an adventure story where the captors are on a quest to learn more about mermaids. It may also have elements of fantasy and magic as the mermaid uses her powers in the captive situation, perhaps to communicate with the captors or to find a way back to the sea.