Well, Kurama might train Naruto by teaching him how to better control and access chakra. Since Kurama has a vast amount of chakra, it could show Naruto unique ways to harness and use it. For example, it could guide Naruto in creating more powerful and complex jutsu by using their combined chakra in a more efficient way.
Kurama might become angry at first. He's a powerful being and being neglected would likely wound his pride. He could start causing some minor disruptions inside Naruto, like making it harder for Naruto to access his chakra.
Naruto's self - confidence gets a huge boost. Kurama's teachings are like a seal of approval. If Kurama believes in him enough to teach him, then Naruto must be something special. This new - found confidence shows in his posture, his speech, and how he faces challenges. He no longer doubts himself as much when it comes to difficult tasks, whether it's a tough battle or a diplomatic negotiation within the ninja world.
It could develop as Naruto spends more time in the mental space where Kurama resides. They start to communicate better, understand each other's motives, and gradually form a deeper connection. This might involve Naruto learning about Kurama's pain and loneliness over the years, which makes Kurama more open to Naruto. As a result, their bond becomes stronger and more symbiotic, allowing them to share power more effectively and support each other in different situations.
Often, the story starts with Naruto realizing the potential of a full merge. Then he has to overcome some internal struggles. After the merge, he usually goes on a power - up spree. He might take on stronger enemies that he couldn't face before.
Maybe Naruto uses his positive energy. Naruto is known for his optimistic and persevering nature. He could flood Kurama with his positive emotions, like hope, friendship, and love. These strong positive feelings might be so overwhelming for Kurama that they gradually soothe his angry and wild nature, thus calming him down.
As Kurama teaches Naruto seals, they develop a sort of teacher - student bond. Naruto respects Kurama's wisdom, and Kurama in turn respects Naruto's determination to learn. This bond might lead to them having more in - depth conversations about the nature of chakra, the history of sealing techniques, and even their own pasts. For example, Kurama might share stories about how certain seals were created in the ancient times and how they were used in battles. Naruto, on the other hand, might tell Kurama about his dreams for the future of the ninja world and how he plans to use these new sealing techniques to bring peace. Through these exchanges, their relationship becomes more complex and multi - faceted.
Perhaps Kurama has some hidden ability that allows it to manipulate matter at a fundamental level. Using this ability, it could assemble atoms and molecules to construct a new body for Naruto. This process might be tied to the Kekkei Genkai in the fanfic, where the unique genetic trait plays a role in how the body is formed and stabilized.
In some fanfictions, Naruto might summon Kurama through a new and special jutsu. For example, he could use a jutsu that combines his own chakra with the unique bond he has with Kurama. This jutsu might be created during a time of great need, like when facing an extremely powerful enemy that normal attacks can't defeat.
Kurama could comfort Naruto by sharing his own experiences. Since Kurama has been alive for a long time, he might tell Naruto about times when he faced difficult situations and how he overcame them. This could give Naruto new perspectives and the strength to keep going. For instance, Kurama could talk about how he endured his long imprisonment and still managed to keep his spirit intact, which in turn would inspire Naruto.