The Legend of Uzumaki Hiroto was a derivative work of Naruto, which told the story of Uzumaki Hiroto's growth and the stories of other characters. Uzumaki Boto Legend was different from the original Naruto Naruto Shimbun Legend, so it was considered an independent manga.
It depends on the specific plot of the fanfic. Sometimes he could be on a secret mission, in a hidden village, or facing a new challenge in an unknown location.
One of the main themes is love. Not just the mother - son love between Naruto and Kushina, but also how Kushina's love for Naruto can be a driving force in the story. For instance, in some fanfics, Kushina's love gives Naruto the strength to overcome great challenges. Also, the theme of sacrifice is common. Kushina sacrificed herself for Naruto, and fanfics often expand on this idea, showing how Naruto honors her sacrifice and what it means for his character development. In addition, there's often a theme of discovery, where Naruto discovers more about his mother and his own identity as an Uzumaki.
One interesting fanfiction could be about Mit Uzumaki and Naruto Uzumaki teaming up to face a new, powerful enemy that the Hidden Leaf Village has never seen before. They could combine their unique skills and family powers to protect the village.
In many fanfictions, Naruto might obtain the Uzumaki sword through a hidden inheritance. Maybe it was left behind by an ancient Uzumaki clan member and Naruto discovers it in a secret location, like an old, forgotten Uzumaki shrine.
In the 'naruko uzumaki rise to darkness fanfiction', it could center around Naruko's internal struggle. Maybe she has a powerful dark force within her that she has been suppressing all along. As she faces various challenges in her life, like the loss of loved ones or the pressure to be a certain kind of hero, this dark force starts to take over. Her relationships with other characters like Sasuke or Sakura could also be affected. She might become a more complex and morally ambiguous character, not just a simple good or bad, but a mix of both as she ascends into the realm of darkness.
Well, he could start a family with Hinata and have lots of kids, passing on his Uzumaki bloodline. Then, he could encourage his friends who have some Uzumaki connection, like Karin, to also have families and pass on their Uzumaki genes. He could also set up a school or training center in the Uzumaki land, teaching the Uzumaki ways of life and ninjutsu, which would attract orphans or those who want to be part of the Uzumaki clan.
The main character is surely Naruko Uzumaki. However, depending on the plot, characters like Hinata could also be important. Hinata has always had a special connection to Naruto in the original story. In this fanfiction, she might be heartbroken to see Naruko turning to darkness and try her best to stop it. Then there could be new characters created specifically for this fanfiction. These new characters could be dark entities that encourage Naruko to embrace the darkness. They could offer her power, knowledge, or a sense of belonging that she doesn't feel in the light, thus making them key players in her rise to darkness.