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.
Perhaps Naruto is on a mission near the sea and gets caught in a magical current that transports him to a hidden mermaid kingdom. In this kingdom, he is seen as a special being. The mermaids, being a matriarchal society, have different ranks of mermaids vying for his attention. He has to figure out how to get back home while also handling the mermaid harem drama.
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.
First, you need to decide on the basic premise. Will it be a crossover where characters from both worlds interact directly? Or will it be more of a 'what - if' scenario, like what if Naruto was born in the Mermaid Melody world? Then, think about the characters. How will Naruto's personality fit into the mermaid world? How will the mermaids react to his ninja skills? You also have to consider the plot. Maybe there's a new villain that threatens both worlds and they have to work together to stop it. Don't forget to add details about the settings, like how the mermaid kingdom looks compared to Konoha in Naruto.
Definitely Hinata. Her love for Naruto is well - known. Sakura, too, as she has grown closer to Naruto over the years. Ino might also be in the harem. She has had her own moments with Naruto and her skills as a ninja could be an asset. And perhaps Karui from the Cloud Village. After Naruto's peace - making efforts between the villages, she could have developed feelings for him.
Sakura would be a likely candidate. She has a long - standing relationship with Naruto, so she could be part of the harem. Hinata is also a strong possibility as she has deep feelings for Naruto. And Ino, who has known Naruto for a long time and has her own charm, could also be in the harem.
Sakura could be in Naruto's harem. In the original series, she had a long - standing relationship with Naruto. In this fanfiction, with Naruto being 'dark godlike', she might be drawn to his new power and the mystery surrounding him. Also, Hinata would be a likely candidate. Her long - held feelings for Naruto could intensify with his new status, and she would be part of his harem due to her loyalty and love for him.
Sakura could be in the harem. She has a long - standing relationship with Naruto in the original series, and in this fanfiction, his Saiyan powers might make her see him in a new light. Hinata is also a likely candidate. Her admiration for Naruto could turn into a deeper relationship given his Saiyan - like abilities.
In a 'Naruto Mermaid Fanfiction', the mermaids could be in danger from an evil organization that wants to capture them for their precious scales. Naruto teams up with a mermaid princess to stop this threat and in the process, they learn about each other's worlds.
Another way of interaction could be through a character who bridges the two worlds. Let's say there is a half - mermaid, half - human character. This character can introduce Naruto to the mermaid world and help the mermaids understand the ninja world, facilitating interactions between different characters from both worlds.