In such a fanfiction, a possible idea is the development of the relationship between Naruto and the female character. It might start off rocky due to the arranged nature. But as they get to know each other, they could discover each other's strengths. For example, Naruto's determination and the female character's unique skills could complement each other.
Sakura could also be a candidate. Given her strong personality, she might initially resist the arranged marriage. But as she gets to know Naruto better and realizes the potential of the Kyuubi's power, she could warm up to the idea. Plus, it would create a lot of drama considering her previous relationship with Sasuke.
There's also 'A New Path in an Arranged Marriage'. In this one, the story focuses on how the arranged marriage changes Naruto's perspective on family and relationships. The female character is strong - willed and helps Naruto see things from a different angle. It has some really interesting twists and turns that keep you hooked from start to finish.
A potential plot twist could be that the arranged marriage was actually a ruse set up by an enemy. They might be planning to use the opportunity of the marriage to get closer to Naruto and somehow steal the Kyuubi's power.
One way to make it interesting is by exploring the power dynamics. Since Naruto has the Kyuubi within him, the arranged marriage could be a political move by the village elders to control that power. For example, they might arrange a marriage with a powerful clan's member to ensure loyalty and the proper use of the Kyuubi's strength.
A good one often has well - developed characters. For example, Naruto should still retain his core traits like his determination and kindness, while the female character should be complex and interesting. The arranged marriage plot should not feel forced but rather a natural part of the Naruto world. So, it could be related to political alliances or some sort of prophecy.
Expect a lot of unique interactions. Since the Kyuubi has always been this powerful and somewhat feared being, a female version in a relationship with Naruto would be quite interesting. Naruto, with his positive attitude, might help to humanize Fem Kyuubi more within the story.
There could be a fanfiction where Fem Naruto discovers a hidden side of Fem Kyuubi. Maybe Fem Kyuubi has some memories or powers that were locked away and Fem Naruto helps her unlock them. This could set off a chain of events that not only changes the relationship between them but also has a major impact on the entire ninja world as they face new threats and opportunities together.
I really liked 'Fem Kyuubi's Bond with Naruto'. In this fanfic, the fem Kyuubi forms a deep emotional bond with Naruto. The author does a great job of showing how they support each other through various challenges. It has some really cool fight scenes where the fem Kyuubi's unique abilities are shown, which makes for an exciting read.
One great fem Naruto x fem Kyuubi fanfiction could be one that focuses on their unique bond. It might explore how they interact in a world where Naruto is female and the Kyuubi also takes a female form. For example, it could show them teaming up against common enemies and how their combined powers are different from the original story.