Jiraiya could be a candidate if he were somehow made immortal. He already has a deep connection with Naruto and has taught him a great deal. His knowledge of Sage Mode and other jutsu could be further expanded if he were immortal, and he could continue to guide Naruto for a much longer time.
The plot could involve the immortal teacher passing on ancient and powerful jutsu to Naruto. For example, the teacher might know a unique form of chakra control that Naruto can use to enhance his Rasengan. This new knowledge could make Naruto stand out even more in battles against strong opponents like Sasuke or the Akatsuki members.
Growth is a common theme. Naruto's growth as a ninja under the teacher's guidance is often explored. Another theme is mentorship, like how the teacher imparts knowledge and values to Naruto.
Kurenai could be a great strict teacher in a Naruto fanfic. She is a jonin and has experience in teaching. Her skills in genjutsu could be used to create strict training scenarios for Naruto. Also, Asuma could be a candidate. He is known for his straightforwardness. In a fanfic, he could be a strict teacher, making Naruto focus on his combat skills and strategy more. He could be tough on Naruto, expecting high standards from him.
The characters could interact through a magical portal. For example, Naruto might accidentally stumble through a portal into the Please Teacher world. He'd be confused at first but then start to make friends with the characters there, sharing his ninja stories.
The concept of a godlike teacher brings new and exciting elements to the Naruto world. It allows for different training methods and power - ups for the characters.
A major theme is identity. Naruto has to re - evaluate who he is in a new and often very different universe. His immortality also makes him a bit of an anomaly, so themes of acceptance and being different are also common. For instance, in a crossover with a high - tech universe, his more traditional ninja skills and immortal state make him stand out. He has to find his place among characters who might not understand his abilities or his immortality at first.
There could be a 'immortal naruto fanfic' where Naruto's immortality leads him to explore different dimensions. In these adventures, he meets versions of his friends and foes from alternate realities and has to find a way to either help or stop them, depending on the situation. This would add a whole new level of excitement and mystery to the Naruto universe.
The unique features of 'naruto immortal hollow fanfic' include a different take on the Naruto lore. It allows for a re - imagining of the ninja way in the context of the immortal hollow. For instance, the idea of chakra might be intertwined with the energy of the hollow. The fanfic can also introduce new types of jutsu that are a mix of Naruto's traditional jutsu and the powers typically associated with hollows. This makes for a very distinct and interesting reading experience compared to traditional Naruto fanfics.
One common theme is the strict teacher pushing Naruto to reach his full potential. For example, the teacher might make Naruto train harder in his ninja skills like jutsu or physical combat. Another theme could be the clash of personalities. Naruto is a free - spirited character, so when faced with a strict teacher, there would be a lot of conflict and growth as he learns to adapt and follow the strict regime. Also, there could be a theme of mentorship. The strict teacher could become a sort of mentor to Naruto, guiding him not only in his ninja abilities but also in his personal growth and understanding of the ninja world.