A common theme in fanfictions about their childhood is the development of their personalities. Sasuke is often shown as brooding and focused on revenge even as a child, and Sakura is presented as having a crush on him early on. This dynamic is explored in different ways. Some fanfictions focus on how Sakura tries to break through Sasuke's shell during their childhood. Another theme is the role of their friends in their childhood. Naruto, for instance, can be a catalyst in their interactions. He might accidentally push Sakura towards Sasuke or create situations where Sasuke has to interact more with Sakura.
In Sasuke and Sakura's childhood fanfictions, a prevalent theme is the school environment. The academy they attend is a place full of opportunities for their relationship to develop. Teachers' influence on them during their childhood is also a point of interest. For example, a teacher might notice Sakura's potential and encourage her to pursue Sasuke not just romantically but also in terms of her ninja skills. Moreover, the rivalry among the students, especially between Sasuke and others, is often explored in relation to his and Sakura's childhood. This rivalry can either draw Sakura closer to Sasuke as she admires his strength or create some distance as she might be caught in the middle of his feuds.
One common theme is their initial meeting. In many fanfictions, it's portrayed as a significant moment that sets the stage for their relationship. For example, Sasuke might be shown as a loner, and Sakura as the curious girl who wants to get to know him. Another theme is the influence of their respective families on their childhood. Sakura's family might be depicted as loving and supportive, while Sasuke's family tragedy shapes his cold exterior during childhood. Also, their early training experiences are often explored. How Sasuke's natural talent and Sakura's determination play out in their childhood training is a key aspect in fanfictions.
Protection is also a theme. Sasuke, even as a child, might have a sense of protecting Sakura from bullies or other threats. In fanfiction, this can be exaggerated and shown in different dangerous situations. And there's the theme of misunderstanding. Their different personalities as children could lead to misunderstandings. For example, Sasuke's quietness might be misinterpreted by Sakura as disinterest, when in fact he cares in his own way.
Love and redemption are very common themes. Since Sasuke has a rather troubled past, many fanfictions explore how he can find redemption through his relationship with Sakura, who loves him unconditionally.
Common themes include the power of love. Sakura's love for Sasuke is so strong that it can break through his cold exterior. There are also themes related to forgiveness. Sasuke has made mistakes in the past, and Sakura has to forgive him. And in many fanfictions, the theme of building a future together is prominent, whether it's rebuilding the Uchiha clan or just living a happy life in the village.
Friendship is a common theme. In many fanfictions, it shows how Naruto and Sasuke's bond began as kids. It was a unique friendship, full of both competition and mutual understanding.
One common theme is Sasuke's struggle to admit his feelings. When he's jealous, it shows that he actually cares more about Sakura than he lets on. Another theme could be misunderstandings. He might misinterpret Sakura's interactions with others as something more than friendship.
Love and affection are very common themes. Since their relationship in the original story had its ups and downs, in fluff fanfiction, it's all about showing their deep love for each other. For example, Sasuke doing small things like bringing Sakura her favorite flower just to see her smile.
Love and redemption are common themes. Sasuke often has a lot to make up for in his relationship with Sakura, and the fanfictions explore how he tries to earn her forgiveness and love. For example, in some stories, he goes on dangerous missions to prove his worth to her.
Love and commitment are common themes. These fanfictions often explore how Sakura and Sasuke, who have a complex history, come to fully commit to each other in marriage. For instance, they might show how Sasuke overcomes his past traumas to be a loving husband.
Love and friendship are also big themes. Their relationship can start as friends or comrades and then develop into something more romantic. Fanfictions might explore how they overcome the barriers between them, like Sasuke's brooding nature or Sakura's insecurities.
A frequent theme is family. In these fanfictions, they often start a family together. There could be stories about how they raise their children, passing on their ninja skills and values. It's also common to see the theme of acceptance. The village accepts their relationship fully, and they become an example of a loving couple. Also, the exploration of their love story, how it developed from Sasuke's initial indifference to Sakura to deep love, is a common theme.