Another theme is the power dynamic. Naruto's Kitsune powers usually make him stronger, and how he uses these powers to protect Hinata is a frequent plot point. It shows his love for her in a very physical and protective way.
The Kitsune aspect can make Naruto more mysterious and alluring to Hinata. His unique powers and form can be something that draws her in and makes her see him in a new light.
Sasuke could be a great addition. His rivalry with Naruto could take on a new dimension if Naruto has Kitsune Hanyou powers. He might be initially suspicious or even envious of Naruto's new abilities. Kakashi could also be included. His wisdom and experience could help Naruto understand and control his Kitsune Hanyou side. Plus, he could offer some training techniques. Another character could be Shikamaru. His intelligence could be useful in devising strategies when Naruto and Hinata face challenges related to the Kitsune Hanyou aspect.
One great Kitsune Naruto x Hinata fanfiction is 'Kitsune's Love'. It beautifully portrays the relationship between Naruto with his Kitsune form and Hinata. The story focuses on how Hinata slowly discovers Naruto's unique Kitsune side and how they grow closer through various adventures.
One idea could be Naruto, as a kitsune, having to protect Hinata from an ancient evil that targets her because of her special Byakugan powers. The kitsune powers of Naruto could add an interesting twist to the battles and their relationship.
One possible plotline could be a story where Naruto has to choose between two versions of Hinata, the original Hinata and a version from an alternate RTN (Road to Ninja) universe. Maybe in this fanfiction, the different Hinatas have unique abilities or personalities that make Naruto's choice more difficult.
I really like 'Naruto and Hinata: Love in the Hidden Leaf'. In this fanfic, the author delves into the small moments between them that were often overlooked in the original series. It shows how Hinata's shy glances and Naruto's obliviousness gradually turn into a mutual understanding and love. Also, 'Hinata's Hope' is a good read. It starts with Hinata's perspective and how she dreams of a future with Naruto, and then the story unfolds to make that dream a reality.
Well, perhaps in the fanfiction, Naruto's Kitsune Hanyou side starts to emerge during a battle. Hinata is the first to notice the change in him. This could lead to a story where Naruto struggles to control his new powers at first. Hinata, using her Byakugan and her understanding of Naruto, helps him. They might then have to deal with the political implications of Naruto being a Kitsune Hanyou in a world that has some prejudices against such beings. Their love story could develop as they break down these barriers and prove that Naruto's new identity is not a threat but a strength.
Another interesting plot could be that there is a prophecy about a Kitsune - human union (Hinata being part Kitsune and Naruto being human) that will save the ninja world from a new, powerful dark force. They initially don't believe it but as strange events start to unfold, they realize it might be true and must embrace their unique bond to face the threat.
Perhaps Hinata's Kitsune heritage comes with a set of rules and traditions. Naruto, in order to be with Hinata, has to learn and respect these. This process of him learning about her Kitsune side and adapting to it can create a very special and unique development in their relationship. He could participate in Kitsune festivals with her or learn the significance of Kitsune symbols which are important to her family.