It could be due to a change in the village's situation. If the village is in a more precarious state, Naruto might feel the need to step up and be more like a soldier. He has always been protective of the village, but now he takes it to a new level. He might start following military - like strategies and behaviors to ensure the safety and well - being of the villagers.
Maybe he saw someone he respected smoking a pipe and thought it looked cool, so he decided to try it.
Maybe for a new plot twist. It makes the story different from the original Naruto storyline.
Maybe he got too stressed out from all the responsibility of being a hero. The pressure of protecting the village and his friends could have pushed him to pick up smoking as a way to relieve stress.
One possible reason could be that the fanfiction author wants to focus on other characters. Maybe they feel they've explored Naruto's character enough and want to give more spotlight to characters like Sasuke or Sakura. Another reason might be that the plot of the fanfiction takes a turn where Naruto's acting skills are no longer relevant or needed.
Well, one reason could be that the author wants to explore a different side of Naruto's character. Maybe they're trying to show how he'd act under extreme stress or in a situation he's not used to. For example, if he was suddenly in a world with different ninja rules.
It might be due to a darker plot in the fanfiction. For example, if the story has a very high - stakes and intense situation, like a war where Naruto believes that only cruel actions can save his village or loved ones. So he starts acting in a way that's contrary to his normal self. Also, some writers may be influenced by other dark - themed anime or stories and want to incorporate that style into the Naruto fanfiction world.
One reason could be to create a more powerful version of Percy. Fanfiction writers might want to see how he would fare in more extreme situations with super - soldier abilities added to his demigod powers. It's also a way to mix different fictional universes and concepts, making the story more unique.
One reason could be for strategic purposes. Itachi was a highly strategic ninja. So, in fanfiction, Naruto might act like him to outwit a particularly difficult enemy. For instance, when facing an enemy who is a master of deception, Naruto could adopt Itachi's calm and calculating demeanor to see through the enemy's tricks.
One possible reason could be in the realm of artistic interpretation in the fanfiction. The author might want to explore a different aesthetic or a unique plot where Naruto has some physical or behavioral traits similar to Orochimaru for shock value or to create a new kind of character dynamic.
It could be that Naruto is trying to prove himself. He wants to show that he can be as great a fighter as his father. Also, he might have received some training or knowledge transfer from someone who knew Minato well. This could have inspired him to adopt Minato's fighting style. He may also be in a situation where his normal fighting style isn't working, so he turns to Minato's as a last resort.