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.
The relationships might change in terms of respect. After seeing their sensei fight in the war, students could have a new - found respect for their abilities. On the other hand, the sensei might view their students as more equal, having seen them grow and fight bravely in the war. For instance, Gai Sensei might see Rock Lee in a new light, not just as a student but as a fellow shinobi who has proven himself in battle.
One challenge could be dealing with the psychological trauma of the students. After the war, the students might have seen a lot of death and destruction. The Jounin Sensei would need to help them cope with it, like Iruka Sensei might have to be extra vigilant with Naruto's state of mind. Another could be rebuilding the shinobi system. They have to adjust teaching methods to fit the new post - war world. For example, they may need to focus more on peace - building and diplomacy in their teachings rather than just combat skills.
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.
With his friends, he would still be close, but there would be a new level of respect. They would see him as a more experienced and powerful shinobi. For example, Sasuke might have a different kind of rivalry with him, one that is more about mutual growth at the Jounin level rather than just power struggles. Naruto's leadership skills would also be more prominent in group situations, which could change the dynamics of his relationships with his friends.
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.
One possibility could be the children of his friends. For example, Boruto could be one of his students. Since Naruto is now a jounin sensei, he could pass on his skills and values to the next generation, especially to Boruto who has his own set of challenges and potential as a ninja.
Naruto's relationship with his students, if he has any as a Jounin, would be very important. He would be a mentor figure. He would have to be strict but also kind, just like Kakashi was to him. He would pass on his values and ninja techniques. His relationship with the Hokage would also be different. He would be closer to being an equal, having more say in important decisions regarding the village's security and future.
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.
If Naruto becomes a Jounin early in fanfiction, his relationship with his peers might change. They could look up to him more, seeing him as a role model. His friends like Sasuke might be a bit jealous at first but would also be proud. His relationship with his teachers could shift as he is now closer to their rank.
In terms of his romantic relationships, if there was a budding relationship with Hinata, for instance, his new status as a jounin could either strengthen their bond as she admires his achievement, or it could create some distance as he has more duties and less time for personal matters.
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.