Iruka - sensei. He was Naruto's first teacher and has a connection to Kakashi as well. He could provide some emotional support or some important backstory information that helps Naruto and Kakashi in their journey in the fanfic.
Iruka could be included. He was Naruto's first teacher and has his own connection to Kakashi. His presence can bring out the different teaching styles between him and Kakashi. Another good character is Jiraiya. His relationship with Naruto as his godfather and his connection to Kakashi through being comrades can add some interesting storylines.
Sasuke could be a great addition. He could be a rival to Naruto even at a young age, and Kakashi would have to deal with their constant bickering. His brooding nature would add an interesting dynamic to the story.
Sasuke could be a popular character. He might be involved in the story in a way that either helps or hinders the situation where Naruto hurts Kakashi. For example, if Sasuke tries to stop Naruto from doing something stupid that would hurt Kakashi.
Shikamaru is a smart choice. His intelligence can be used to solve problems that Kakashi, Naruto and the others face. And his lazy - but - actually - really - smart attitude can provide some comic relief. Also, including the Third Hokage can give the story more depth, as he is the leader of the village and has a lot of knowledge and influence over the kids' lives.
The main characters are Kakashi Hatake and Naruto Uzumaki. Kakashi, with his wealth of ninja knowledge and experience, plays a crucial role in the fanfic. He's the one who will be guiding Naruto. Naruto, on the other hand, is the protagonist whose growth and development are at the center of the story. He's the one with the Nine - Tails inside him, and his journey under Kakashi's raising is what the fanfic is likely all about.
Well, one similarity could be their determination. In the fanfic, like in the original series, both Naruto and Kakashi are very determined. Naruto is always striving to become Hokage and Kakashi has his own goals and missions he's dedicated to. They also might share similar combat styles in the fanfic, perhaps Naruto starts to adopt some of Kakashi's strategic thinking during battles.
Naruto is often very well - written in these fanfictions. His determination and growth are usually highlighted. For example, in some stories, his loyalty to Kakashi is shown in a very touching way, like when he refuses to leave Kakashi's side even in the face of great danger.
Sasuke could be a side character. Since Naruto is getting special training from Kakashi, Sasuke might feel jealous or motivated to train harder himself. Sakura could also be there, perhaps she tries to learn from Kakashi's training methods to help Naruto better. Another potential side character could be Iruka, who might check on Naruto's progress from time to time and offer some words of encouragement.
Another great part is the advice Kakashi gives. He's a skilled ninja and has a lot of wisdom. In some fics, he might teach Naruto a new way to approach a problem, not just in fighting but also in dealing with his emotions towards the villagers who once shunned him. He might say things like 'Naruto, their opinions don't define you. Only you can decide who you are.'
Sakura could be a great addition. She's a strong kunoichi and her medical skills could come in handy in many situations. For example, if Naruto and Sara are on a dangerous mission, Sakura could be there to heal their wounds. Another good character is Kakashi. His wisdom and experience would be valuable, especially when they face tough decisions or difficult enemies.