One common theme is redemption. For example, Hinata might travel back in time to try and save Sasuke from his darker path. Another theme is the exploration of alternate relationships. Since Hinata and Sasuke don't have a major relationship in the original Naruto series, in these fanfictions, their relationship gets explored in new and interesting ways.
Love and friendship are also prevalent themes. Hinata's time travel could lead to a deeper bond between her and Sasuke, which might start as friendship and develop into love. Additionally, the theme of changing the past for a better future is often seen. Hinata may use her knowledge of future events to prevent tragedies or make positive changes in the Naruto world.
One common theme is redemption. For example, Sasuke might go back in time and try to fix the wrongs he did in the original timeline. Another theme is love. Hinata might use the time travel to get closer to Naruto earlier or in a different way.
One common theme is redemption. Sasuke often needs to find his way back to the good side, and Hinata can be a part of that journey, like in many stories where her kindness helps him. Another theme is growth. Both characters grow as individuals and in their relationship. For example, Hinata might become more confident in the presence of Sasuke, and Sasuke might learn to open up more.
One common theme is redemption. Hinata might go back in time to right the wrongs she or others have committed in the original timeline. Another theme is love. Since Hinata has feelings for Naruto, time travel can be a way to explore a different kind of relationship development, like falling in love all over again in a different context.
One common theme is self - discovery. When Hinata travels through time, she often has to re - evaluate who she is and what she's capable of. For example, in some stories, she might find that she has more strength and influence in the past than she thought.
Often, there's the theme of the unexpected. Since Sasuke was mainly associated with Sakura in the original story, the idea of him falling for Hinata is unexpected. Also, the theme of self - discovery is present. As Sasuke falls for Hinata, he discovers new aspects of himself and his ability to love and be loved. There may also be themes related to family acceptance, as they come from different clans.
The theme of transformation is also quite common. Sasuke's vampire state may lead to Hinata changing in some ways, perhaps becoming more confident or learning to fight better to be at his side. And vice versa, Sasuke might transform his view of the world and his place in it because of Hinata. There's also the mystery theme, as vampire lore usually brings an air of mystery to the story.
A common theme is cultural differences due to their clan backgrounds. Also, there's often the theme of love against all odds. Since in the original series they don't end up together, fanfiction writers like to show how they can overcome the odds and build a loving marriage. There can also be themes related to protecting their new family and dealing with threats from the outside world.
One common theme is the forbidden love aspect. Since Sasuke and Hinata are from different clans in the Naruto universe, adding the vampire element makes it even more complex and forbidden. Another theme could be the power struggle. If Sasuke is a vampire, he might have powers that are difficult to control, and Hinata could be the one to help him. Or vice versa.
One common theme is the adjustment period. They come from different backgrounds, so stories often focus on how they adapt to living together. Another theme could be family acceptance, especially considering Sasuke's complex past.
One common theme is the exploration of a relationship that was not in the original Naruto story. It often involves Sasuke breaking away from his usual aloofness towards Hinata. Another theme could be Hinata's growth in confidence as she is loved by Sasuke.