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.
Naruto would gain better combat awareness. Kurama's experience in battles can be passed on to Naruto. He'll be able to read his opponents better, know when to attack and when to defend. This will make him a more formidable opponent in combat situations.
There are quite a few. For instance, when Naruto first realizes that Kurama actually cares about him. It's a moment of revelation for Naruto, and the way Kurama shows his concern, even if it's in his own brusque way, is really sweet. Also, during a particularly cold night, Kurama might use his chakra to keep Naruto warm. This simple act of kindness shows that Kurama is not just a powerful beast but also has a caring side. And when Naruto is doubting himself, Kurama tells him stories of his own experiences to inspire Naruto, which is a very heartwarming exchange between them.
Often in fanfictions, Kurama's human form and Naruto have a more complex relationship. They could argue at times, especially when Naruto wants to take risks that Kurama thinks are too dangerous. But at the same time, they also share some really tender moments. For instance, Kurama's human form might comfort Naruto when he's feeling down about his past or his struggles with the village. They would have a deep bond that goes beyond just being a jinchuriki and a tailed beast.
Kurama's care can have a profound influence on Naruto's growth. For one, Kurama's power, which Naruto can access, gives him a physical boost in battles. This newfound strength helps Naruto face tougher opponents and survive dangerous situations. Emotionally, Kurama's presence provides a sense of companionship. Naruto no longer feels completely alone, and this gives him more confidence. Kurama's advice, based on his long existence and knowledge, also guides Naruto in making better decisions. For example, when dealing with complex political situations in the ninja world, Kurama might offer insights that Naruto wouldn't have considered on his own.
It could also be due to a misunderstanding. Suppose Naruto accidentally does something that Kurama misinterprets as a threat to its own existence. For example, if Naruto tries a new jutsu that Kurama wrongly perceives as an attempt to suppress it further.
Well, it's hard to say who the 'best' is as it depends on personal taste. But some popular authors in the Naruto fanfic community often write great Kurama - Naruto related stories. One author to check out might be 'KitsuneWrites'. Their stories usually have really in - depth characterizations of both Kurama and Naruto.
Well, in fanfiction, Kurama's human form could be a really imposing figure. He might have long red hair, just like his fox form's fur color, and bright, piercing eyes. Maybe he'd be tall and muscular, with a sort of wild, untamed look about him, still carrying that powerful presence that he has as a tailed beast.
One idea could be a fanfic where Kurama and Naruto have a telepathic adventure outside of the normal Naruto world. They explore different dimensions and encounter strange creatures together.