If Mikoto were Naruto's Jounin Sensei instead of Kakashi, the story would be completely transformed. Naruto would be immersed in the Uchiha culture much sooner. Mikoto could teach Naruto about the Uchiha's history, which might inspire Naruto to find a way to reconcile the differences between the Uchiha and the rest of the village. In terms of combat training, Mikoto might focus on Naruto's speed and precision, traits often emphasized in the Uchiha clan. She could also encourage Naruto to develop his own unique style that combines the Uchiha's techniques with his own Uzumaki - based abilities. This would not only make Naruto a more formidable ninja but also change the way he interacts with other characters in the story, especially those related to the Uchiha clan.
In this fanfiction, perhaps Mikoto could teach Naruto some unique Uchiha techniques. Since she's from the Uchiha clan, she might have insights into fire - style jutsu that could help Naruto diversify his skills.
Their relationship would become more complex. As a sensei, Naruto would have to be more authoritative towards his sister, which could be a change from their normal sibling dynamic. He would need to correct her mistakes and push her to improve, which might cause some initial friction.
The overall story arc could be altered significantly. Kakashi was involved in many important plot points related to Team 7, such as dealing with Orochimaru's threats to Sasuke. Without him, Team 7 might face these challenges in a completely different way. They might form new alliances or face more difficulties without Kakashi's strategic planning and combat skills to back them up.
Tenten would also be an interesting choice. She could focus on weapon - based combat training for Team 7. Since she has extensive knowledge of all kinds of weapons, she could introduce new and unique weapon techniques to the team.
Naruto could use his own life story as a teaching tool. He could tell his students about how he was an outcast as a kid because of the Nine - Tails inside him, and how he overcame all the difficulties. This would inspire his students to keep going no matter what obstacles they face. He would also be very passionate about teaching them new jutsu and would probably show them some of his own unique techniques like the Rasengan.
In fanfiction, the relationships could become more protective. For example, Kakashi Sensei might be even more cautious about sending his students on dangerous missions after seeing what they went through in the war. The sensei may also become more of a confidant. Students who have witnessed the horrors of war might open up more to their sensei about their fears and insecurities.
Naruto's teaching style could be more about practical experience. He would take his students on real - life missions early on to give them a taste of the real shinobi world. He would also be more lenient when it comes to rules, as long as the end goal of becoming strong shinobi is achieved. Hinata would be more strict about following the proper form and technique in training. She would also emphasize the importance of mental focus and emotional stability, perhaps teaching her students meditation techniques she herself uses to stay calm in battle.
Perhaps Naruto, as a young Jounin sensei, has to deal with a student who has a dark past similar to his own. He has to figure out how to help the student open up and trust him. Naruto uses his own story of growing up alone and being shunned by the village at first to connect with the student. He shows the student that they can rise above their past and become a great ninja.
One interesting plot could be the Jounin sensei having a secret past with one of the main villains. For example, they were once comrades but had a falling out. This could add layers of mystery and drama to the story as the sensei has to keep this a secret while training Team 7.
Another challenge would be dealing with the different personalities and goals of his students. Some students may be more interested in becoming powerful for revenge, while others may want to use their skills for the good of the village. Naruto would have to balance these different motives and guide each student towards a positive path while still respecting their individual desires.