Obviously Naruto would be one of the main characters. He could be joined by his friends like Sasuke and Sakura. And of course, the tuna fish would be a central character as well, whether it's a regular tuna fish with a special role or a magical, anthropomorphic tuna fish.
In some Naruto tuna fish fanfic, Kakashi could also play an important role. He might be the one who discovers the mystery behind the tuna fish and guides Naruto in dealing with it. And perhaps some of the villains from the Naruto universe could be involved too, seeing the tuna fish as a means to gain power or disrupt the ninja world.
One idea could be a fanfic where Naruto discovers a magical tuna fish that can grant wishes. He might use it to bring back a fallen friend or to end a long - running conflict in the ninja world.
As I don't know the details of 'tuna a love story', I assume the main character is probably the tuna. There might also be other sea creatures involved, like other fish or maybe even a seagull or a dolphin that could play important roles in the story related to the tuna's love story.
Since it's a fanfic, it could really vary. But likely Naruto himself would be one of the main characters, as it's in the Naruto universe. And perhaps some of his friends like Sasuke or Sakura could also be involved if the fish cake affair somehow impacts their relationships or the village as a whole.
The main characters in 'fish cheeks story' are the girl (the narrator), her mother, and the minister's son.
The main character is the Rainbow Fish. He has beautiful, shiny scales. And there are also the other fish in the sea who interact with the Rainbow Fish.
One of the main characters is Edward Bloom. He is a larger - than - life figure known for his tall tales. Another important character is his son, Will Bloom. Will is often frustrated by his father's fantastical stories but comes to understand him better over time.
Since I don't know the exact 'fish friends story', it could be any number of fish. Maybe there's a little clownfish as one of the main characters.
Typically, there is a person walking along the beach and the starfish. The person is the one who decides to take action and save the starfish.
The fish wife, of course, is one of the main characters. There may also be other characters like her husband, if there is a part in the story about her family life, or perhaps other fishermen or people in her village.
The main characters are the boy and the fish, obviously.