Obviously, Naruto and Hayate would be the main characters. Naruto is the protagonist who will be learning from Hayate.
There could also be other characters like Sakura and Sasuke. Sakura might be a bit jealous of Naruto getting special training from Hayate and try to prove herself in other ways. Sasuke could be a rival to Naruto even in this new training scenario, constantly comparing his own progress with Naruto's under Hayate's tutelage.
Characters like Kakashi might also make an appearance. He could be initially skeptical of Naruto learning from Hayate but later see the benefits. And of course, there might be some original characters created specifically for this fanfiction, perhaps other ninjas who are also apprentices of Hayate or enemies who want to stop Naruto's training.
Obviously, Naruto and Hiruzen would be the main characters. Naruto as the apprentice and Hiruzen as the mentor.
Obviously, Naruto and Anko would be the main characters. Naruto, the energetic and determined ninja, and Anko, the somewhat eccentric and skilled kunoichi.
Anko might also be involved in the story. She has her own unique relationship with Yugao and could potentially interact with Naruto. Maybe she gives Naruto some tough love or challenges him in a way that Yugao's teaching methods don't cover. And of course, Iruka sensei could also show up to check on Naruto's progress and have some interactions with both Naruto and Yugao.
One potential antagonist could be a power - hungry shinobi from another village. They might view Hayate as a threat to their plans, maybe because Hayate is involved in some sort of peace - keeping mission between villages. So, they try to eliminate him. And Naruto, being the defender of his comrades, will not stand by and let that happen. There could also be a group of missing - ninjas who band together to take on Hayate, thinking he's an easy prey, but they underestimate Naruto's loyalty and strength.
Well, it could be about Naruto learning unique sword techniques from Hayate. Maybe Hayate, being a skilled ninja, imparts his knowledge of stealth and quick strikes to Naruto, which Naruto then incorporates into his own fighting style.
The main characters are Naruto, the hero we all know, and Hayate. Naruto is known for his never - give - up attitude and his powerful ninja skills. Hayate is often depicted as a more mysterious figure. He might have some special abilities or knowledge that Naruto needs. In addition, antagonists from the Naruto universe might also play a role in these fanfictions, making the relationship between Naruto and Hayate even more interesting as they face these challenges together.
In 'harry is an apprentice fanfiction', apart from Harry, there might be other apprentices too. They could be his friends or rivals during his apprenticeship. Also, we can't rule out the appearance of some of the main antagonists from the original series, as they might try to interfere with Harry's apprenticeship journey.
Another possible main character could be a new villain. Since Harry is in a new role as an apprentice, there could be someone who wants to steal the secrets of Ollivander's wand - making. This villain could be a dark wizard or a rogue wizard who has his own motives for wanting to control the wand - making process. Harry would then have to protect Ollivander and the shop from this threat.
There could also be other characters from the Naruto universe that play important roles. For instance, Tsunade might be involved as she has a connection to Jiraiya. She could offer additional guidance or be a source of conflict when she disagrees with Jiraiya's training methods for Naruto.
Obviously Naruto would be one of the main characters. He's the protagonist of the original series and his power and will would be crucial in a doomsday scenario. Sasuke would also be likely, as his strength and his connection to Naruto are important elements. Sakura, with her medical skills, would also be a key character as she could be responsible for healing the injured during the doomsday chaos.