Friendship could be a big theme. Even though they are from different villages, they could form an unlikely friendship in the fanfiction. Maybe they start writing letters to each other secretly. Another theme could be self - discovery. Gaara is trying to figure out his place in the world with the Shukaku inside him, and Sakura is trying to prove herself as a capable ninja.
Well, their childhood bond in a fanfiction could be centered around mutual growth. Gaara had his inner demon to deal with, and Sakura was constantly trying to prove herself as more than just a fangirl. They might have met when Sakura was collecting herbs for Tsunade and Gaara was wandering in the forest. Gaara's calmness in the face of the forest's wildness intrigued Sakura. She started to talk to him, and Gaara found her chatter oddly comforting. This led to them sharing their dreams and fears. Sakura dreamed of being a great medical ninja, and Gaara just wanted to find a place where he belonged. Their conversations could have spurred each other on in their respective paths.
For Sakura, she might become more confident in her combat abilities. Working with Gaara, who has such strong and intimidating power, could push her to step up her game. She could also develop more empathy as she gets to know Gaara's troubled past. For Gaara, he could start to open up more to others. Sakura's kindness and determination might make him realize that not everyone is out to harm him.
One common theme is the exploration of their different upbringings. Sakura had a relatively normal life in Konoha at first, while Gaara had a very lonely and traumatic childhood. Fanfictions might focus on how they understand each other's pasts.
A frequent theme is the exploration of their unique abilities. Sakura's medical ninjutsu and combat skills combined with Gaara's sand powers can create interesting scenarios. For example, they might work together to develop a new jutsu that combines their powers. Also, love against all odds is a common theme, as their different villages and roles in their respective communities might pose challenges to their relationship.
One possible plot could be a tournament - style setting where Gaara and Sakura are pitted against each other. They fight, and Sakura tries to use her medical knowledge to find a weakness in Gaara's sand defense.
Well, it could show their early training days. Maybe Gaara was all alone in his training while Sakura was with her teammates. It could explore how they might have felt about their respective situations. For example, Gaara's loneliness compared to Sakura's somewhat normal (but also challenging) training with Kakashi and the others.
Gaara might start to show more of his soft side. With Sakura by his side, he could become less isolated and more involved in the social aspects of his village. His leadership style could also change, becoming more collaborative. Sakura, she would become more in tune with the desert environment and the needs of the Sand Village. She would probably develop her fighting style to incorporate some of the Sand techniques, which she learns from Gaara. Also, her understanding of love and family would deepen as she builds a life with Gaara.
One possible plotline could be that Gaara and Sakura are on a joint mission in a far - off land. They start off as just comrades but gradually learn to understand each other's past traumas. Gaara shares his experiences of being an outcast in the Sand Village, and Sakura tells him about her insecurities regarding her strength compared to her teammates. As they face various challenges together, they develop a deep bond of friendship that could potentially turn into something more romantic.
One possible plot could be that Gaara discovers a new type of jutsu that allows him to fly and he decides to teach Sakura. As they practice together, they bond over their shared experience and overcome their individual insecurities. They then use their new flying ability to explore new areas and encounter various challenges along the way.
One common theme could be the exploration of their relationship in different scenarios. Maybe how they overcome challenges together.