One possible plot twist could be that Naruto loses control over his transformation into the Nine - Tailed Fox in a completely unexpected situation. Maybe during a friendly spar with his friends, and this causes them to fear him in a new way. It would add a whole new layer of drama to their relationships.
Perhaps a really cool plot twist would be that when Naruto turns into the Nine - Tailed Fox, he doesn't just have the normal form. He takes on a new, more powerful and terrifying form that no one has ever seen before. This form could have abilities that are not only related to the Nine - Tailed Fox's chakra, but also something completely new and unique. It would shock his enemies and even his allies, and would require everyone to re - evaluate their understanding of Naruto and the Nine - Tailed Fox.
In this type of fanfiction, often Naruto's transformation into the nine - tailed fox can lead to some really cool battle scenes. He could use the fox's speed and strength in unique ways. Like, he might be able to run up walls or jump extremely high to attack enemies from unexpected angles. Also, there could be a plot where Naruto has to enter a sort of spiritual realm within himself to communicate with the nine - tailed fox and gain better control over their combined form.
One interesting plot could be Naruto fully transforming into the Nine - Tailed Fox during a battle against a powerful enemy. His friends are initially shocked but then try to find a way to bring him back to his senses.
Well, if Naruto turns into the nine - tailed fox in a fanfic, it would be really cool. He would likely be almost uncontrollable at first, as the power of the nine - tailed fox is so immense. But as the story progresses, he could learn to harness that power. His friends might be both in awe and a bit scared of him. And he could use the nine - tailed fox's abilities like its tails for attacks and its natural cunning in combat situations.
His appearance would change a great deal. The Nine - Tailed Fox's features would start to show, like the ears and the tails. And his personality might also be affected. He could become more aggressive or more instinct - driven due to the fox's influence. There could also be a change in how his friends see him. Some might be afraid, while others would try to help him control this new power.
His relationship with the villagers could become more complex. Some might see him as a greater threat, while others who have come to know Naruto as a hero might be more accepting. His transformation could also lead to new alliances as some might want to use his power for their own purposes, which Naruto would have to navigate carefully to protect his relationships.
Obviously Naruto himself, as he is the one turning into the Nine - Tailed Fox. Sasuke would also likely be involved. He might be the one to try and reach Naruto when he is in his fox - form, either to fight him or to bring him back. Sakura too, she could use her medical ninjutsu to try and help Naruto if he gets injured during the transformation.
It could make his friends more cautious around him. For example, Sakura might be a bit more hesitant to get close, fearing the power of the Nine - Tailed Fox. But at the same time, some like Sasuke might see it as an opportunity to become stronger by sparring with Naruto in this new form.
He also has to deal with the public perception. People who are afraid of the nine - tailed fox might start to shun or even attack Naruto. And in battles, his enemies might target his connection to the nine - tailed fox, trying to force him to transform and lose control. He needs to be constantly vigilant about this.
There are fanfictions where the Nine - Tailed Fox has a split personality. One side is the fierce and powerful beast, and the other is a more gentle and understanding entity. Naruto has to deal with both sides, which creates a very complex and different kind of relationship compared to the original series. This can lead to some really interesting character development for Naruto as he tries to balance and understand this unique relationship.
Well, one possibility is that Naruto gains an instant boost in power. Since the Nine - Tailed Fox is extremely powerful, he could easily defeat his enemies. For example, in a battle against a powerful Akatsuki member, with the Nine - Tailed Fox by his side, Naruto could use its chakra to perform stronger jutsus and outmatch his opponent.