In some 'Naruto has secrets' fanfictions, Naruto might have a secret past life that he starts to remember fragments of. These memories could hold the key to some great power or knowledge that he needs to save the village or defeat a powerful enemy. It could also change how he views his present life and relationships.
One possible secret could be that Naruto has a hidden power passed down from an ancient clan that he discovers later in the fanfiction. Maybe it's a special chakra ability that gives him an edge in battles.
In this fanfiction, Naruto might reveal his insecurities about being the Jinchuriki at first. He could share how he was really scared of the Nine - Tails inside him and how he had to constantly battle with the fear of losing control.
One possible secret could be about Naruto's real parents' untold past. Maybe there are hidden details about how his father and mother met that were not in the original story.
Another idea is that Naruto has a dark secret regarding his past training. Maybe he had to do some unethical or dangerous things during his training with Jiraiya that he's ashamed of. This could include using forbidden jutsu or making deals with dark entities in order to gain power, which would be a huge shock to his friends and the village if it ever came out.
It could be Naruto himself. As he grows and faces new challenges, he might stumble upon these secrets, either by accident or through his own determination to learn more about his world and his place in it.
One interesting plot idea could be exploring a secret training regime that Naruto discovers. Maybe it was created by an ancient ninja clan and it gives him unique powers. For example, it could involve harnessing the power of natural elements in a different way than normal chakra control.
Well, one secret could be about the true origin of a certain character. Maybe in the fanfiction, it reveals that a side character has a much more important family lineage than was previously thought in the official Star Wars lore. For example, they might be related to a powerful Jedi or Sith from the past.
Some fanfictions might have travel secrets related to accommodations. In a Lord of the Rings - inspired fanfic, there could be hidden inns or shelters that are not on the regular maps. These places are known only to certain groups, like the rangers. They are usually safe havens, offering rest and protection from the various dangers in the fictional world.
The dark secrets can add a lot of tension to the plot. If Naruto has a secret related to an evil organization, it could make his friends and allies question their trust in him. They might start to suspect his every move, and Naruto would have to struggle to prove his loyalty while also dealing with the truth of his situation.
One family secret story was about a hidden inheritance. A family had an old attic that no one really bothered with. But when they finally decided to clean it out, they found a box full of old letters and a deed to a small property that had been forgotten for generations. Turns out their great - grandfather had bought it but never told anyone. Another story is of a family that discovered they had a famous relative. A young girl was doing some genealogy research and found out that her great - aunt was a silent movie star. It was a huge shock as the family had no idea about this part of their history.
One of the secrets could be about hidden relationships between characters. For example, a secret friendship that was never shown in the original books but explored in the fanfiction.