In this fanfiction, Naruto is the central figure. Alongside him, we might expect to see characters like the Raikage from Kumo. Their interactions and differences in ideologies could be a major part of the story. There could also be some minor characters from both Konoha and Kumo who help to build the background and context of Naruto's decision to abandon Kumo, like the shopkeepers or other common shinobi who witness the events leading up to this big decision.
Well, Naruto is obviously one of the main characters. He's the central figure who brings his own skills and experiences from Konoha to Kumo. Then there would likely be some original Kumo characters created for the fanfiction. For example, a strong Kumo ninja who becomes Naruto's rival or friend. There might also be a Kumo leader or elder who plays an important role in how Naruto is received and integrated into the village.
I'm not sure specifically as it depends on the author's creation. But it might involve Naruto having some sort of conflict with Kumo and then abandoning it. Maybe there are issues like political differences, or problems with the shinobi from Kumo that lead Naruto to this decision.
Obviously Naruto would be one of the main characters since it's in the title. And since it's about saving Wave as a Kumo fanfiction, there might be some Kumo ninjas involved too. Maybe Killer Bee or some other well - known Kumo shinobi.
It could be Killer Bee. He's a very well - known and powerful ninja from Kumo. His unique fighting style and his status as a Jinchuriki would make him a great candidate to be the one who saves Naruto.
It could be a rogue Kumo ninja who is jealous of Naruto's power and wants to prove himself by defeating Naruto. This ninja might have some dark secrets and a grudge against Kumo as well.
The main characters are Naruto, who is in a rather tragic situation with his godlike abilities yet being abandoned. And Kushina, whose actions of abandonment drive the story forward. There might also be other characters like Naruto's friends or other ninja from the village who could play roles in how Naruto copes with the abandonment and his journey with his powers.
Sakura could be a main character. She might be the one who discovers the abandoned child and tries to figure out what to do. Kakashi could also be involved. He has a history with Naruto and might be torn between loyalty to Naruto and doing what's right for the child. Sasuke could be another character. He might return to the village and get involved in the situation, either to help or because he has his own motives regarding Naruto's actions.
Definitely the Kumo ninjas who carry out the kidnapping. There could be some well - known Kumo characters like Killer Bee. He might be involved either directly in the kidnapping (unlikely as he is more of a good guy in the original) or in the events that follow. Another character could be the Raikage. He may or may not be aware of the kidnapping depending on the plot. If he is aware, his actions and decisions would play a major role in how the story unfolds.
Naruto is a given in this fanfiction. In Kumogakure, Mabui could be part of the harem. She is intelligent and in charge of a lot of important operations in the village. Her relationship with Naruto could start from her helping him with some village - related tasks. Another potential character is Omoi. Although he is male, his interactions with Naruto could lead to the female characters around him taking more of an interest in Naruto, thus contributing to the harem idea.
Obviously Naruto is the main character. And sometimes his parents might be involved in a more complex way, like through flashbacks or alternate storylines where they had reasons for the so - called 'abandonment'.