Often, the main characters are the ninjas themselves. They could be young trainees starting their journey.
There might be a master ninja who plays a central role. This master would be responsible for training the younger ones and leading them in missions. They are usually highly skilled and respected within the ninja community.
Sometimes, there could be an antagonist, like a rival ninja clan's leader or a powerful samurai who is in conflict with the ninjas in the story. These characters add drama and conflict to the 'ninja life story'.
The main characters in the ninja turtle story are the four turtles - Leonardo, Donatello, Raphael, and Michelangelo, and their sensei Splinter, as well as the villain Shredder.
Most likely, the main character is the boy ninja himself. There could also be his ninja master who teaches him the ways of the ninja.
I'm not sure specifically, but there could be the Ninja Kid himself as the main character.
Since it's Ninja Kids Story, the main characters could be a bunch of young and brave kids. There might be a leader among them, who is very determined and smart. Another character could be the funny one, always making jokes even in dangerous situations. And there could be a shy but very talented kid when it comes to using ninja tools.
I'm not sure exactly, but likely there are some cute ninja girls as main characters.
Ninja Hattori is definitely one of the main characters. And of course, his master Kenichi should be there too.
The super ninja boy is the central figure. But there could be other characters like his best friend who is always by his side during his adventures. And perhaps an antagonist, an evil ninja or a powerful sorcerer who is trying to stop the super ninja boy from achieving his goals.
I don't know for sure, but it could be the ninja himself or herself as the main character. Maybe there are also some opponents like rival ninjas or samurais.
In a 'spy ninja novel', the main character is likely to be the spy ninja. This character would be the focus of the story, with their actions driving the plot forward. There could also be other important characters, such as the villain they are up against. This villain might be a powerful criminal or a rival spy. Additionally, there could be supporting characters like the spy ninja's friends or allies from their spy or ninja community. They might provide help, information, or be in need of rescue at some point in the story.
I don't know the specific main characters in 'the ninja gamer fanfic' as it can vary greatly depending on the author's creation. But it could be a ninja - named protagonist like 'Kai' who is also a top - notch gamer.