Perseverance is another key theme. Naruto faces numerous challenges and setbacks throughout his life, but he never stops believing in himself and working towards his goals. This shows the power of perseverance in achieving one's dreams.
One common theme is the passing of the torch. Older Naruto is often shown mentoring the younger generation, like how Kakashi mentored him. Another theme is dealing with the scars of past battles, both physical and mental.
One common theme is the exploration of their self - discovery. Since they are the same person in a sense, they can see different aspects of themselves. For example, one Naruto might be more confident while the other is more reserved, and they learn from each other.
Teamwork is also a big theme. Despite being the same person in essence, the two Narutos often have to learn to work together. This can be challenging as they may have different personalities due to their different experiences. For example, one Naruto might be more cautious while the other is more impulsive. And the theme of friendship also plays a role, as they are, in a way, their own best friends in these stories.
Another theme is self - discovery. As Naruto faces his dark side, he often learns more about his true nature, his powers, and his place in the ninja world. It's like a journey of self - exploration but with a dark and dangerous twist.
One common theme is the mentor - mentee relationship. Tsunade, being an experienced ninja and one of the Sannin, often takes Naruto under her wing in fanfictions. She can teach him things like better chakra control or more advanced combat techniques. Another theme is the exploration of their past traumas. Both have faced significant losses in their lives, and fanfictions may delve into how they can heal each other. For example, Naruto can help Tsunade move past the deaths of Dan and Nawaki, while Tsunade can offer Naruto wisdom on dealing with the absence of his parents.
Another theme is the exploration of the Naruto universe from a different angle. Since it's a harem fanfiction, it can show different sides of the characters and their interactions in a non - canon way. For example, how Naruto's new relationships might change his goals or how the female characters interact with each other because of their shared feelings for Naruto.
The theme of growth is very common. All three characters - Naruto (the adopter), Naruto (the younger self) and Sasuke - experience personal growth. They learn from each other, share their skills and knowledge. For example, Naruto might teach Sasuke some new jutsu, while the younger Naruto learns about the importance of friendship from Sasuke. This mutual growth is what makes these fanfictions interesting.
Another common theme is growth. Naruto and Hinata both grow as individuals and as a couple. In many fanfictions, they face challenges that help them become stronger. Like they might face a powerful enemy that forces them to improve their skills while also strengthening their bond.
The theme of sacrifice also shows up a lot. Both Naruto and Sasuke are characters who are willing to sacrifice for the other in the original story, and this is often explored further in fanfiction. Writers might create scenarios where one has to make a big sacrifice for the other, which then tests and deepens their relationship.