Naruto would likely be initially shocked. He has always considered the Kyubii as a part of him and a friend in some ways. So the betrayal would be a huge blow to his sense of trust.
Another aspect could be related to her past or origin. If she has some hidden memories or a secret agenda tied to her existence as the Fem Kyubii, it could lead her to betray Naruto. For example, if there are some dark forces that are controlling or influencing her from her past, she may be forced to turn against Naruto against her will in a sense.
Naruto could also feel a sense of confusion. He might wonder what he did wrong or what made Fem Kyuubi choose Sasuke over him. This confusion could lead him to question his own worth and his relationships with others. However, in true Naruto fashion, he would eventually rise above these negative feelings and focus on his goals, like protecting the village and his friends.
At first, Naruto would likely be extremely shocked. He has always considered Sakura a friend and teammate, so this would be a huge blow. He might question his own judgment in trusting her.
However, Naruto also has a big heart. In the long run, he would probably try to find a way to save Kakashi or bring him back to the right side. He wouldn't give up on Kakashi easily, believing that there must be some underlying reason for his actions and that he can be redeemed.
One possible plot could be that Naruto discovers some dark secrets about Konoha's leadership. For example, he might find out that they were involved in unethical experiments in the past. This discovery could make him feel betrayed first, and then lead him to take actions that Konoha sees as betrayal, like refusing to follow orders or even teaming up with an enemy of Konoha who he believes has a more just cause.
One possibility could be a misunderstanding. Maybe Kakashi is framed for something that makes Naruto believe he has betrayed him. For example, an enemy could use a clone of Kakashi to perform a heinous act, and Naruto witnesses it without seeing the full picture.
Well, if we think about it, 'kyubii consumes naruto fanfiction' might imply that the kyubii (assuming it's from the Naruto universe, like the Nine - Tailed Fox) has some sort of interaction with the fan - made stories about Naruto. It could be that these fanfictions are a source of something for the kyubii, like inspiration for new powers or behaviors in alternate fan interpretations. For example, in some fanfictions, the kyubii might gain new abilities or form different relationships, and this statement could be a way of saying it's taking in those ideas from the fanfiction realm.
Well, it could imply that the character Kyubii has a negative impact on Naruto fanfiction. Maybe in some fanfictions, the way Kyubii is portrayed or the changes it brings to the Naruto universe in those stories are considered 'corrupting' in the sense that it goes against the original essence or the expectations of the Naruto world.
Not really. While some fans might feel that way in certain cases, many Naruto fanfictions involving Kyubii are well - received. There are a lot of creative and interesting interpretations of Kyubii in fanfiction that add depth to the Naruto universe.