It might be for Naruto's own good. Sasuke may believe that Naruto is on a dangerous path that will lead to his downfall. So he captures him to keep him from making bad decisions, like sacrificing himself for the village or something similar. He wants to save Naruto from himself in a sense.
In some fanfictions, Naruto might reject Sasuke because of Sasuke's continuous pursuit of power in a way that endangers others. Naruto, who values friendship and the safety of the village, could see this as a betrayal of their shared values.
Naruto might protect Sasuke by using his physical strength. He's got those powerful jutsus like the Rasengan. If any enemy comes near Sasuke, Naruto can just blast them away with his attacks.
One great 'Ranma y Naruto fanfic' is 'The Crossover Adventure'. It combines the unique elements of both Ranma 1/2 and Naruto really well. The story has Ranma ending up in the Naruto world and his martial arts skills causing quite a stir among the ninja.
Another theme is the exploration of their individual growth within the relationship. For example, Naruto may grow in his understanding of relationships while Ino might grow in her confidence as they get closer. It's about how they change and become better versions of themselves because of each other. And sometimes, there's also the theme of overcoming obstacles together, like dealing with the opinions of their friends or the demands of the ninja world.
One popular 'naruto y hinata fanfic' is 'The Road to Happiness'. It beautifully portrays their relationship development, from Hinata's shy admiration to Naruto finally realizing his true feelings for her. Another great one is 'A New Beginning' which shows their life after getting married and facing new challenges together in Konoha.
In a good 'naruto y hinata fanfic', the characters need to be in - character. Naruto should still be the determined and sometimes clueless hero, and Hinata should be the shy yet strong - willed kunoichi. The story should also fit well within the Naruto universe, like having the right kind of jutsu and village settings. It should also have an engaging plot, whether it's about them going on an adventure together or just dealing with life in Konoha. For instance, a story where they team up to solve a mystery in the village can be really exciting.
Love and friendship are common themes. Since Naruto and Sakura have a long - standing relationship in the original Naruto series, fanfics often explore how that relationship could develop into a romantic one. Another theme is growth, both as individuals and as a couple.
A common theme is the power of friendship. Despite their differences, Naruto and Satsuki often form a strong bond in these fanfics. Another theme is growth. They both grow as characters, Naruto might help Satsuki become more open - minded and Satsuki could assist Naruto in becoming stronger.