One interesting plot twist could be that the hero, who was thought to be Naruto all along, turns out to be someone unexpected like Iruka. Maybe in a battle against a powerful enemy, Iruka suddenly reveals hidden powers and a deep connection to a long - forgotten ninja art. This would completely change the dynamic as everyone had their expectations set on Naruto being the ultimate hero.
Well, a cool plot twist might be that Naruto, instead of following the path of the hero everyone expects, takes a dark turn for a while. He could be influenced by an ancient and evil jutsu that makes him see his friends as enemies. This 'turn of a hero' would shock everyone, especially his closest comrades like Sasuke and Sakura. They would then have to find a way to bring him back to the light without having to fight him to the death.
In a Naruto fanfic with the 'turn of a hero' concept, it could be that the hero is not a shinobi at all. Imagine a situation where Tenten, who is often overshadowed by the more powerful ninjas, discovers a way to use ordinary tools in an extraordinary way that can defeat the most powerful foes. This would be a huge 'turn of a hero' as she was never really in the spotlight before. It would also show that being a hero doesn't always require some super - special bloodline or rare jutsu.
A minor character like Choji could experience a 'turn of a hero' by suddenly mastering a new and powerful form of his Akimichi clan's techniques. Maybe he discovers a way to combine his food - based jutsu with some sort of spiritual energy, allowing him to defeat an enemy much stronger than himself. This would make him a hero in the eyes of the village.
Well, it could be about Naruto writing a letter to his hero. Maybe it's to someone like Jiraiya. He might be expressing his gratitude for all the teachings and inspiration. He could be sharing his own growth and how he's trying to live up to the hero's example.
One possible plot could be that Naruto somehow gets transported to the world of My Hero Academia. He could be mistaken for a new type of Quirk user at first. Maybe he tries to understand their system of heroes and villains while also showing off his ninja skills, which would be really unique in that world. And he could end up teaming with some of the My Hero Academia characters to fight a common enemy that threatens both worlds.
Well, one possible plot twist could be that Rias discovers a hidden power within Naruto that is related to Ophis. Maybe Naruto has some sort of connection to Ophis' power source that no one expected. Another could be that the fanfic throws in a time - travel element where Rias goes back in time and changes something that affects Naruto's hero journey in relation to Ophis.
One possible plot could be that a wizard has the ability to 'rent a hero' from a magical service. Harry Potter himself could be rented out to help a young, struggling wizard face a new dark threat in the wizarding world. He could use his skills and experiences to train this wizard and together they could uncover a plot by a group of Death Eaters who are trying to revive Voldemort in a new way.
One interesting plot twist could be that Naruto, as a girl, has to deal with different types of relationships. For example, Sasuke might view her in a whole new light, leading to a more complex love - hate dynamic. Another could be that the female Naruto uses her new - found femininity to deceive enemies. She could pretend to be a damsel in distress and then surprise them with her ninja skills. Also, the story could take a turn where the female Naruto becomes a role model for other female ninjas in the village, changing the traditional gender roles in the ninja world.
One possible plot could be that Naruto has done something heroic in the Hidden Sand Village. Temari, being a proud citizen of the Sand, decides to thank him personally. Maybe Naruto saved the village from a powerful enemy or a natural disaster. Temari could approach Naruto with a traditional Sand Village gift as a token of gratitude. Along the way, they start to have conversations and get to know each other better, leading to a deeper understanding and friendship between the two characters.
In this fanfic, the creator of Taijutsu and Ninjutsu could be a character from a different dimension. He arrives in the Naruto world with advanced knowledge of combat and chakra manipulation. He decides to share this knowledge with the inhabitants of this world. But there are those who oppose his teachings, fearing it will disrupt the existing power balance. The fanfic could explore how he overcomes these oppositions and how his teachings gradually transform the ninja world into what we know in the Naruto series.
I'm not sure specifically as I haven't read this particular light novel. It could be about a character who undergoes a transformation over the course of ten years and becomes a hero. Maybe it involves a journey of self - discovery, facing various challenges, and growing in strength and character during those ten years.
A simple plot could be Kushina's adventures as a young ninja. She goes on missions, faces various enemies, and discovers new jutsu. For example, she could be part of a team that has to retrieve a powerful artifact from a dangerous location.