One popular theme is friendship. In these fanfictions, Sasuke, Naruto and Sai often form a unique bond. They might go on adventures together, learning about each other's pasts and growing closer as friends. Another theme could be teamwork. For example, they face a powerful enemy and have to combine their skills, like Sasuke's Sharingan, Naruto's Rasengan and Sai's ink techniques to win. Also, self - discovery is quite common. Each character may discover new aspects of themselves through their interactions with the other two.