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.
In this fanfiction, the plot could revolve around Naruto's sister being a bit of a rebel. Naruto, as her Jounin Sensei, has to find a way to channel her energy in a positive way. He might start by taking her on a solo mission to a remote area where they can bond without distractions. There, he could share his own experiences of being an outcast in the village when he was younger and how he overcame those feelings. This could inspire his sister to take her ninja training more seriously and follow in Naruto's footsteps to become a great ninja.
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.
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 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.
One possible Jounin Sensei of Team 10 in Naruto fanfiction could be Shikamaru's father, Shikaku Nara. He was a highly intelligent shinobi and his strategic mind could be a great asset in training the members of Team 10.
One popular fanfic in this theme might be 'The Path of a Young Ninja'. It delves into how Naruto's jounin sensei helps him grow not just in skills but also in understanding the deeper aspects of being a ninja. The sensei in this fic is portrayed as a strict yet caring figure, guiding Naruto through various challenges that test his resolve and loyalty to the village.
His training style might focus on teamwork, just like how he learned with his friends. He could use his own experiences to teach the genin about the importance of believing in each other. For example, he might set up team exercises where the genin have to rely on each other's skills to complete a task.
Well, one possibility is that he takes his students on really dangerous and exciting missions. Maybe they go to a far - off land to fight a new kind of enemy that no one has ever seen before. Naruto would use his own experiences as a ninja to guide his students, like how he learned to never give up from his own training.
One common theme is growth. Naruto helps his students grow as ninjas and as people. Another is the passing on of values. Naruto, having learned a lot from his own mentors, passes those values to his students.