There might also be other characters involved. For example, Sakura could make an appearance. She might be curious about Naruto's new training and how it's changing him. Kakashi could also be in the story. He might have some input on Tenzo's training methods or give Naruto some additional advice based on his own experiences.
Obviously, Naruto and Tenzo would be the main characters. Naruto, as the one being trained, is the protagonist of the Naruto series. And Tenzo, with his unique skills, is the trainer in this fanfic.
The plot might involve Tenzo seeing Naruto's potential but also his flaws. So he decides to train Naruto not only in physical and ninjutsu skills but also in mental strength. Tenzo could share his own experiences of dealing with the dark side of the ninja world, helping Naruto to better understand the importance of balance and self - control. This training could be a turning point for Naruto, making him more mature and a more formidable ninja.
Obviously, Naruto and Deadpool would be the main characters. Naruto is the one being trained and evolving into a 'godlike' state. Deadpool is the trainer who brings his own set of skills and personality to the story.
Obviously, Naruto and Asuma would be the main characters. Naruto, the protagonist of the Naruto series, is the one being trained. And Asuma, a respected jonin in the Hidden Leaf Village, is the trainer.
The main characters would be Naruto and Hiruzen. However, we might also see characters like Kakashi make an appearance. Kakashi could be a bit jealous at first that Hiruzen is taking Naruto under his wing, but then he might see the benefits and offer his own advice to Naruto on the side.
Obviously Naruto would be one of the main characters as the title implies he is being trained. And then, the RWBY characters like Ruby, Weiss, Blake and Yang would also be main characters since they are the ones doing the training.
Obviously, Harry Potter himself. And then there would be the goblins. Maybe Griphook, as he was one of the more well - known goblins in the original series. He could be one of the main trainers of Harry.
The main characters are Naruto, the well - known ninja from the Hidden Leaf Village, and Vergil, who is likely from another realm or universe with his own set of powerful skills. In this fanfic, their interaction forms the core of the story as Naruto looks to Vergil for training and growth.
Well, obviously Naruto himself would be the main character. There could also be his friends like Sasuke and Sakura, who might be involved in the interactions between the two Narutos. Maybe they are confused at first by seeing two Narutos, but then they help them figure out what's going on.
Obviously Naruto would be one of the main characters as the title implies he is the one being trained. King Kai would also be a major character as he is the trainer. There might also be some cameos or interactions with Dragon Ball Z characters like Goku or Vegeta, since the fanfiction combines the two universes.
It could still be Naruto himself. Since he's the central character in the original series, many fanfics would likely continue to build on his story.