Obviously, Naruto and Kyuubi are the main characters. Naruto, the protagonist of the Naruto series, has a special connection with Kyuubi, the nine - tailed fox. In this fanfiction, their relationship is explored further, and they become friends.
In some fanfictions, Naruto might start by trying to understand the Kyuubi's pain. He could use his own experiences of being an outcast in the village to empathize. As he shows this understanding, the Kyuubi begins to see him as different from the other humans who just fear it. They might start having conversations in Naruto's mindscape, gradually building a bond of mutual respect.
Well, obviously Naruto and the Kyuubi are the main characters. Naruto, the young and determined ninja, and the Kyuubi, the powerful nine - tailed fox sealed within him. Their relationship forms the core of the fanfiction.
Another plot could be Kyuubi teaching Naruto some ancient and forgotten ninja techniques. As a powerful and ancient being, Kyuubi might know some techniques that have been lost over time. Naruto could then use these new techniques to surprise his opponents in battles and also contribute to the growth of the ninja arts in the village.
There could also be a storyline where Naruto and the Kyuubi team up to face a common enemy that neither of them could defeat alone. They have to rely on each other's strengths, with Naruto's determination and the Kyuubi's raw power. This adventure would bring them closer as friends and show the world that they are a force to be reckoned with.
They could go on a journey to discover the origin of the Kyuubi's power. Naruto has always been curious about the power within him, and with the Fem Kyuubi as a friend, they could explore ancient places together. Maybe they find some long - lost scrolls that explain the true nature of the Kyuubi's power and how it was created. Along the way, they face various obstacles like traps set by ancient shinobi clans who wanted to keep this knowledge hidden.
A common scenario is when Naruto is on the verge of death. The Kyuubi realizes that if Naruto dies, it might also be in a bad situation. So, it decides to cooperate and in the process, they start to understand each other better and become friends. Another is when Naruto enters the Kyuubi's lair in his mindscape and instead of fighting, he tries to have a peaceful conversation, which leads to friendship.
The Fem Kyuubi might be in trouble or weakened somehow. Naruto senses this and instead of taking advantage, he offers his help. He uses his own chakra to soothe her or protect her from whatever is threatening her. This act of kindness surprises the Fem Kyuubi. She has never experienced such a selfless act from a human before. This makes her lower her guard and start to trust Naruto. They then start to interact more often, with Naruto bringing her stories from the outside world and the Fem Kyuubi sharing her ancient knowledge with him, thus forming a friendship.
His friends might be a bit more cautious around him at first. After all, the Kyuubi is a very powerful and somewhat feared entity. But as they see that Naruto is still himself, they gradually become more accepting. For example, Sasuke might initially be on guard but then realize Naruto is still his friend.
When the Kyuubi possesses Naruto, his friends' trust in him is tested. Some, like Shikamaru, might be more cautious and try to keep an eye on Naruto to make sure he doesn't go out of control. Others, like Choji, might be more sympathetic and try to offer Naruto support. This possession changes the dynamics. Naruto might feel isolated as his friends struggle to understand what's going on with him, and it takes time for them to rebuild their normal relationships.