At first, it might be a relationship of mutual suspicion. Naruto is used to seeing Kyuubi as a source of power but also a potential threat. As the story progresses, they start to understand each other more. For example, through shared experiences in battles.
There's also 'Kyuubi's Daughter and Naruto'. This fanfic focuses on the interactions between Naruto and the female Kyuubi character. It has some really good action scenes intertwined with their relationship building. The author does a great job of portraying the emotions and the power dynamics between them. However, the pacing can be a bit off in some parts, but overall it's an enjoyable read.
Some fanfics show the female Kyuubi teaching Naruto more about his own chakra nature and how to better control it. This is a great way to develop their relationship in a non - lemon way. It's all about mutual growth and respect. They might also have conversations about the history of the tailed beasts and how Naruto can use that knowledge to bring peace between humans and the tailed beasts.
Well, one possible interesting plot point could be the unique bond that forms between Naruto and Kyuubi in a non - traditional way. Maybe they have to work together to overcome a new and powerful enemy that neither could face alone.
A good 'Naruto 18 x Female Kyuubi' fanfic should have a well - developed relationship. For example, it could show how they understand each other's powers and how they complement each other. The characters need to be in - character, so Naruto should still have his determination and the female Kyuubi should have her own personality traits related to her fox nature. Also, a great plot that isn't just centered around their relationship but also has some adventure or a greater threat to the Naruto world.
I'm not entirely sure as I haven't read this specific fanfic. But generally, a 'kyuubi x kushina' fanfic might explore the relationship between the Nine - Tailed Fox (Kyuubi) and Kushina in a creative and fictional way, perhaps with some made - up adventures or interactions that deviate from the original Naruto storyline.
Well, often there's a theme of love and loyalty. Since it's a harem situation, Naruto has to navigate his feelings among the different members of the harem, which includes the fem Kyuubi. There can also be a theme of adventure. Maybe they go on quests together or face challenges as a group. And sometimes, there's a theme of self - discovery. Naruto might discover new aspects of himself through his interactions with the fem Kyuubi and the other harem members.
Naruto's character often develops in terms of his emotional maturity. In a harem situation with a fem Kyuubi, he has to handle multiple relationships, which makes him more understanding and empathetic. He also might develop his leadership skills as he is sort of the center of this group. He'll learn to make decisions that benefit the whole 'harem' and not just himself.
One common theme is power. Since Kyuubi is a source of great power, many fanfics explore how Naruto uses or struggles with this power. Another theme is friendship. Despite their initial enmity, they can become friends in the fanfics.
Typically, in such a fanfic, Naruto might be portrayed with more effeminate traits while interacting with the Kyuubi. This could include changes in his behavior, speech patterns, or even his appearance.