In Naruto's sad past fanfiction, the theme of identity is often explored. Naruto doesn't know much about his parents or his own heritage at first. This can lead to a journey of self - discovery in the stories. Another theme could be the power of love and kindness. Even though he was treated poorly, he still has a big heart. Fanfictions might show how this kindness helps him overcome his sad past. Also, the theme of redemption can be present. Maybe Naruto tries to redeem the villagers' views of him through his actions.
His sad past makes him more determined. In fanfiction, just like in the original, Naruto uses his past as fuel to get stronger. He doesn't want to be looked down upon anymore.
Here are some sad sentences about the past, hoping to bring some resonance and comfort to everyone:
1. Think of the memories of the past, savor the sadness of the present, and think of the hardships of the future.
2. With the simplest life and the most distant dream, our memories are the sun, the sun is stainless!
3. Perhaps memories have fallen into the sea, some past events may not come back, time may steal away, waiting, love for a long time may be separated, this is love.
4. After the baptism of time, the memories of the past are a little blurry. Although I have forgotten her face, I will remember this matter. When I was injured, she once helped me.
5. The person who clearly said that they would grow old together, but left you without a word halfway through. He had thought that there was still a long way to go, but the moment he turned around, he was gone. It must be very sad that the person she once liked so much could no longer be with her.
These sentences expressed memories of the past and sad feelings, hoping to bring some resonance and thought to the readers.
A Naruto fanfiction can be sad when it delves into the sacrifices Naruto has to make. He gives up so much of his personal life and relationships for the sake of the village and his friends. If a story highlights how he loses his close friends, like Sasuke in some darker interpretations, it can be extremely sad. Additionally, if it shows Naruto being misunderstood by the people he's trying to protect, that also adds a layer of sadness. For instance, if the villagers still don't trust him despite all his efforts, it can be a very tragic situation for Naruto.
Naruto has been through a lot in his own time, so he may use that experience to adapt to the past. He might start by making friends with the younger versions of people he knows. He'll also have to be careful not to reveal too much about the future to avoid disrupting the timeline. He could use his ninja skills to earn respect and find his place in the past world.
One aspect of Naruto's sad childhood in fanfiction could be his loneliness. He was shunned by the villagers because of the Nine - Tails inside him. In many fanfictions, authors explore how he coped with this isolation, like finding solace in small acts of kindness from a few people, such as Iruka - sensei.
Unfulfilled dreams can also be a theme. Naruto has always dreamed of becoming Hokage to gain the respect and recognition of the village. If in a fanfiction, something prevents him from achieving this dream, like an unexpected injury or a political conspiracy, he would be extremely sad. He has put so much effort and hope into this dream, and to see it slip away would be a huge blow to him.
He might try to change certain events. For example, he could prevent some of the tragedies that occurred in the original story. Maybe he would stop the Uchiha massacre by warning the clan or finding a way to resolve the conflict between the Uchiha and the village leadership.
I would recommend 'Naruto's Childhood Redefined'. This fanfiction focuses on Naruto's early years in a different way. It adds some interesting backstories to his relationships with Iruka and the villagers. It's a great read if you want to see a new take on Naruto's past.
He would probably use his leadership skills. Naruto has grown into a great leader as Hokage. In the past, he could quickly assess situations and lead others, whether it's in a battle or in village - building activities.