Growth is also a theme. Through the process of confessing, Hinata often grows as a character, becoming more confident in herself and her feelings. Naruto may also grow in his understanding of Hinata's feelings towards him.
Love and courage are very common themes. Hinata has always been shy, so it takes a lot of courage for her to confess her love to Naruto.
Another interesting fanfic could be set in an alternate universe where Hinata is a famous ninja and Naruto is a regular villager. Hinata's confession in this scenario would be different as she has to overcome her status and the social differences to tell Naruto how she feels.
Growth is another common theme. Both Naruto and Hinata grow as characters in the original series. In fanfics, their growth as individuals and as a couple is often explored. For instance, Naruto may grow in his role as a leader while Hinata grows in confidence, and these changes impact their relationship.
Unity is also a theme. The collar can represent the unity between Naruto and Hinata, not just in their relationship but also in their fight against common enemies. It can be a physical manifestation of their shared goals and the strength they get from each other.
One common theme is power exploration. Since Hinata has this 'futa' aspect, it often leads to exploring new powers and abilities. Another theme is self - discovery. Hinata may go through a journey of understanding this new part of herself.
Love and relationship are very common themes. Since Naruto and Hinata end up together in the original series, fanfics often expand on their relationship, showing how they grow closer and support each other.
One common theme could be sacrifice. Hinata might die to save Naruto or the village. Another theme could be grief, as Naruto and their friends would have to deal with her loss. And there might be a theme of revenge, where Naruto or others seek to avenge her death.
Another common theme is the growth of their relationship. Some fanfics focus on how they continue to understand each other better over time. Hinata might become more confident with Naruto's love, and Naruto might learn more about Hinata's quiet strength. It's about how they evolve as a couple.
The theme of legacy also often appears. Hinata comes from the Hyuga clan and Naruto has his own heroic legacy. Fanfics may explore how these legacies combine and influence Bolt's path. For example, Bolt might inherit certain powers or a sense of duty from both his parents, and the fanfic will show how he grapples with and grows from that.
Love and growth are common themes. Naruto's growth as a character is often intertwined with his realization of love for Hinata. He goes from being oblivious to his feelings to fully embracing them.
One common theme is over - protection. Hinata, being possessive, is always shown as trying to shield Naruto from harm. Another theme could be loyalty. Their possessive relationship is often built on unwavering loyalty to each other.