The two main characters would be Naruto and Kaguya for sure. However, depending on the plot, other important characters from the Naruto universe could make an appearance. It could be the tailed beasts, as Naruto has a strong connection with them. If the situation involves something related to the chakra of the ninja world, the tailed beasts might be involved in some way. Or perhaps characters from the Otsutsuki clan could be relevant if Kaguya's actions are related to her clan's history or powers.
Sasuke would most likely be involved. Since he has a strong bond with Naruto, he would sense something is wrong and try to free Naruto from Kaguya's control. Sakura might also be part of it as she cares about Naruto and would be determined to save him. Kakashi could play a role too, using his wisdom and experience to figure out a way to break Kaguya's hold on Naruto.
Obviously, Naruto would be one of the main characters as he is the one being saved. And then there would be members of the ANBU. They could be some well - known ANBU members from the original Naruto series or some original characters created specifically for this fanfiction.
Obviously, Naruto would be one of the main characters as the title implies he is the one being saved. And the Kami, which is the one doing the saving, would also be a main character. It could be an existing Kami from the Naruto series, like the Sage of Six Paths who could be considered a Kami - like figure, or it could be an entirely new creation for the fanfiction.
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.
Well, it could be that Naruto is in a near - death situation, poisoned or severely injured. Kaguya, having a change of heart, decides to save him. She might use her chakra to heal Naruto's wounds and restore his strength. It could also be that Kaguya saves Naruto from a trap set by an ancient evil that she has knowledge of. She steps in because she realizes Naruto's importance in the balance of the ninja world.
Obviously Naruto would be one of the main characters since it's about him being the heir of Kaguya. Sasuke could also be a main character as Naruto's rival and friend. Sakura might be involved too, as she is part of Naruto's team. And there could be other characters like Kakashi, who would play a role in guiding Naruto as he discovers his new identity. There might also be some new characters introduced that are related to Kaguya's past, who either help or hinder Naruto on his journey.
Sasuke could be a likely candidate. He has always been Naruto's rival, and if he sees Naruto teaming up with Kaguya, who was once a great threat, he might oppose them. He may suspect that Kaguya has some ulterior motive and that Naruto is being naive in trusting her.
Perhaps some rogue ninja from other villages. They might see Naruto as a symbol of Konoha's power and want to take him down to weaken Konoha. These rogue ninjas could be led by a powerful and vengeful shinobi who has a grudge against Konoha. So when Naruto is alone on a mission or something, they attack, and that's when Minato steps in to save him.
Sasuke can also be involved in some cases. Since he and Naruto are often together in many situations, Sasuke's presence might add some complexity to the relationship between Kaguya and Naruto. For example, Sasuke might be suspicious of Kaguya's intentions towards Naruto at first.
The main characters would surely include Harry Potter. He is the central figure in the Harry Potter series, and the story is about him being saved. The Winchesters, Sam and Dean, are also key. They bring their own set of skills and personalities from their own show. In addition, characters like Dumbledore might also play a role. He is the wise leader in the wizarding world and could either be aware of the Winchesters' presence or be clueless and later be impressed by their abilities to save Harry.