In addition, some of the more mysterious characters from Arthurian legend related to Merlin could make an appearance. Maybe Morgana could be a character in the fanfiction, either as an adversary or someone who has a complex relationship with Merlin and thus affects Harry's training in some way.
Obviously, Harry and Merlin are the main characters. Harry is the one being trained, and Merlin is the trainer.
There could also be other characters from the Harry Potter universe. For instance, Hermione might be involved as she is always interested in learning new magic and could be curious about Merlin's teachings. Ron could also be there, providing some comical relief and also learning from Harry's experiences with Merlin. And Dumbledore might play a role too, perhaps guiding Merlin on how to train Harry in a way that aligns with the values of Hogwarts.
Obviously, Harry and Merlin are the main characters. Harry, the young wizard from Hogwarts, and Merlin, the legendary wizard from the past.
Obviously, Harry Potter and Flitwick are the main ones. Harry as the student being trained and Flitwick as the trainer.
Obviously, Harry Potter would be one of the main characters. And then, there would probably be some members of the SAS. They could be tough, experienced soldiers who take on the task of training Harry.
Obviously, Harry Potter and Godric Gryffindor. There might also be some other Hogwarts founders making cameo appearances.
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.
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 surely be Anakin Skywalker and Count Dooku. Anakin is the protagonist in a sense as we would see his development through Dooku's training. Dooku, on the other hand, is the one who imparts his knowledge and skills, and his character would also be explored in terms of his motives for training Anakin.
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, Anakin Skywalker and Revan. Anakin is the one being trained, so he will be a central figure. His growth and development under Revan's tutelage will be a major focus.