Maybe it's because Naruto has some sort of special connection or resemblance to the Kyuubi that Kushina notices. For example, Naruto might display some of the Kyuubi's power characteristics in an obvious way that makes Kushina jump to that conclusion.
On the positive side, some might see Naruto as a powerful asset. Since the Kyuubi is extremely powerful, if they believe Naruto is the Kyuubi, they could try to use his power for their own good. However, this also means they might not see Naruto as an individual with his own feelings and will. His relationships would become more about what he can do for others rather than true friendship.
Well, in fanfictions about Naruto, Kushina and Kyuubi, their relationships can vary greatly. Some fanfictions might focus on how Naruto inherits not only the Kyuubi's power but also some of Kushina's traits. For example, Kushina was known for her strong will, and Naruto might be shown to have an even stronger will because of her influence and the presence of the Kyuubi. The Kyuubi could be portrayed as a protector of Naruto in a sense, especially when it comes to threats that are related to Naruto's family history. And Kushina could be like a spiritual guide for Naruto when it comes to dealing with the Kyuubi's power.
In a fanfiction like this, Fem Kyuubi's love for Naruto could be a deep, almost possessive kind of love. Since Naruto has always been different from others in how he treats the Kyuubi. As for hating Kushina, it could be that Fem Kyuubi blames Kushina for separating her from the world for so long. And this could lead to a lot of internal conflict within Naruto, who loves his mother but also has a bond with Fem Kyuubi.
Well, it could be about a version of Naruto who has a dark side believing that he is the Kyuubi. Maybe in this fanfic, his self - identity gets all muddled up with the power and nature of the Kyuubi, leading to some really interesting and dark character developments.
A sense of discovery is also a common theme. Both characters might be discovering new aspects of themselves and their feelings for each other. It could involve the discovery of a new form of love that they hadn't experienced before. This theme can add an element of excitement and novelty to the fanfiction, as readers get to follow along with the characters' emotional and self - discovery journeys.
Well, Naruto could save Kushina from the Kyuubi in fanfiction through his strong willpower. We know Naruto has an unbreakable spirit. He might be able to communicate with the Kyuubi in a different way, like showing the Kyuubi a future where it doesn't have to be so violent. And by doing this, he could convince the Kyuubi to release Kushina. Also, Naruto might have received some special power or training that enables him to counter the Kyuubi's attack and save Kushina.
One possible plot could be that Naruto grows up with a unique connection to the fem Kyuubi. Since his mother Kushina was also linked to the Kyuubi, Naruto might have an even stronger bond. He could learn special jutsus from the fem Kyuubi's chakra, which makes him stand out among his peers in the ninja academy. His relationship with the fem Kyuubi could be like a mentorship, guiding him on his path to become a great ninja.
Yes, there might be some out there. Fanfiction is a vast world and with a concept like 'fem kyuubi loves naruto kushina bashing', there could be writers who have explored this idea. You can start by looking on popular fanfiction websites. Just be aware that 'kushina bashing' might not be in line with the positive aspects of the Naruto story.
The idea of a fem kyuubi in Kushina is interesting because it gives a fresh perspective on a well - known character. It allows for new storylines and character interactions that we don't see in the original Naruto series.