Well, a common theme is discovery. In many Naruto Sea King fanfictions, Naruto discovers a whole new world related to the sea. It could be an underwater civilization or a hidden power source. Also, friendship is a theme. He might make friends with sea creatures or other characters who are also involved in the sea - related plot. There's also the theme of transformation. Naruto's character may change as he adapts to his new sea - related circumstances, becoming more in tune with the sea and its ways.
A frequent theme in 'naruto scorpion king fanfiction' is redemption. The Scorpion King, who may be seen as a villain in his own right, might seek redemption in the Naruto universe. Also, the theme of friendship often comes up. He could form unlikely friendships with the characters in Naruto, like with Shikamaru or Sakura, which then changes his perspective on things.
One of the main themes in 'naruto blood king fanfiction' is transformation. Naruto's change into the blood king usually involves a significant physical and mental transformation. There's also the theme of isolation. Sometimes, his new powers and identity make him feel isolated from his friends and the ninja community at large. And of course, there's the overarching theme of destiny. His becoming the blood king is seen as part of a greater destiny that he has to fulfill, whether it's to save the ninja world or to bring about a new era of peace and power.
One common theme is the clash of cultures. Naruto's ninja world has its own set of rules and values, and One Piece's pirate world is very different. So stories often deal with how characters from one world adapt to the other. Another theme is power - ups. Writers might give Naruto characters Devil Fruit - like abilities or have One Piece characters learn ninjutsu.
One common theme could be power dynamics. Since Naruto is in a king - like role, there would be themes related to leadership and how he manages his relationships within the harem. Another could be loyalty among the members of the harem towards Naruto.
In 'naruto king of heaven fanfiction', a common theme is Naruto's god - like powers. He could be able to manipulate time, space or even reality. Another theme is the respect or fear that he instills in others due to his new powers. This can lead to complex relationships with his friends and enemies alike. Also, the idea of Naruto having a grand destiny that goes beyond the original story's scope is often explored. For example, he might be tasked with saving the entire ninja world from a threat that no one else could handle because of his unique powers as the 'king of heaven'.
One common theme is self - discovery. Female characters often embark on a journey in the sea to find out who they really are. For example, they might discover a hidden power or a long - lost heritage.
Power struggle is a common theme. Naruto, who is known for his own power growth in the original series, often has to face the overwhelming power of the Demon King Daimao or its related entities. Another theme is the clash of good and evil. Naruto represents good, and the Demon King Daimao is the epitome of evil, so there's always that conflict.
Adventure is a very common theme. Since the original 'Sea of Monsters' is full of adventures, fanfictions often continue that trend with characters going on quests and facing various monsters.
Another theme is connection. It could be a connection between the female character and the mysterious creatures of the deep sea. Maybe she forms an unlikely bond with a giant octopus or a bioluminescent jellyfish. This theme explores the idea that even in the vast and alien deep sea, there can be a sense of kinship.
A common theme is power and its control. Sea Dragon Slayers often have to grapple with the immense power they possess. Another theme is friendship. They form strong bonds with other characters.