Perhaps an elder from the Hyuga clan who sees Naruto's potential and decides to pass on the knowledge of the Gentle Fist. This elder might be someone who wants to break the traditional boundaries of the clan and believes that Naruto can bring new life to the technique. He could have a strict teaching style, pushing Naruto to his limits.
Another possibility is that Naruto stumbles upon an ancient scroll that contains the secrets of the Gentle Fist and through self - study, he becomes his own teacher. However, he might still get some guidance from his friends like Shikamaru, who could offer strategic advice on how to incorporate the Gentle Fist into his combat style.
It could be Hinata. Since she is a master of the Gentle Fist in the Naruto universe, she would be a logical choice to teach Naruto. She has a deep understanding of the technique and also has a close relationship with Naruto, which would make for an interesting dynamic in the fanfiction.
Sasuke could be Naruto's teacher. Since Sasuke is a master of the Chidori, he might decide to teach Naruto as a way to make Naruto a more formidable ally. They have a complex relationship, and this could be a way to strengthen their bond.
One possibility could be Kakashi. Since Kakashi is already a very versatile ninja with skills in many areas including some swordsmanship, he could teach Naruto kenjutsu. He has the patience and the knowledge to pass on the skills.
One interesting aspect could be Naruto's struggle to adapt to the precise and delicate nature of the Gentle Fist. In some fanfictions, he might initially find it difficult to control his chakra in the way required for the Gentle Fist techniques. For example, he could accidentally use too much force and disrupt the flow of his training. Another part could be how Naruto combines his own unique fighting style with the Gentle Fist. Maybe he adds some of his Rasengan - like energy into the Gentle Fist movements, creating new and powerful attacks.
Another possibility is that an old hermit who once studied the Gentle Fist in the past but is not directly related to the Hyuga clan could help Naruto. This hermit could have a different approach to the technique, one that is more spiritual. He could teach Naruto how to connect his inner chakra with the natural energy around him to enhance the power of the Gentle Fist. This way, Naruto would not just be recreating the technique in a traditional sense but also evolving it.
Well, perhaps Naruto discovers some ancient scrolls that detail the secrets of the Gentle Fist. He then spends countless hours training in isolation, trying to master the precise chakra control required. As he progresses, he might start to incorporate his own unique style into the Gentle Fist, like adding some of his Rasengan - inspired movements.
Maybe Tsunade. She is known for her love of sake. She could have some hidden knowledge of the Drunken Fist. Since she is also a very powerful ninja, she could train Naruto in both the physical and strategic aspects of the Drunken Fist. She could show him how to use his chakra more effectively while performing the drunken - like maneuvers.
A traveling nen master could be Naruto's mentor. This master could be on a journey to spread the knowledge of nen. He crosses paths with Naruto and decides to teach him. The master might have a strict teaching style, pushing Naruto to his limits, but also guiding him carefully through the complex world of nen.
There's a possibility that it's a spirit or a deity in the world of bending. This entity is impressed by Naruto's tenacity and chooses to guide him on his journey of learning bending.
One common theme is power enhancement. Writers often explore ways to make the Gentle Fist more powerful. Another is legacy, like how the technique is passed down through generations.
Kakashi could be a great mentor. Since he was Minato's student, he has first - hand knowledge of Minato's techniques. He could teach Naruto the fundamentals of the Yellow Flash's fighting style, like how to control chakra for high - speed movement.