One frequent theme is changing the course of history. Since they are going back in time, they might try to prevent certain bad events from happening or make better choices for their group or the world they are in. Also, the theme of friendship and loyalty often comes up. They have to rely on each other in this new time - traveling adventure, which can strengthen their bonds.
The theme of identity is also common. When demigods go back in time, they may have to hide their true identities to fit in or face challenges because of their different nature. Also, there's often a sense of adventure. They are in a new, yet old, world and they have to navigate through different cultures and situations, which makes for an exciting read in fanfiction.
The theme of changing fate also frequently appears. Shirou going back in time means he has the opportunity to change the fate of his friends, his city, or even the whole world. He has to make decisions that could completely rewrite the future, and this struggle between his desire to change things and the potential consequences is often explored in these fanfictions.
One common theme is redemption. Naruto often goes back in time to right the wrongs of the past, whether it's saving a fallen comrade or preventing a great disaster. Another theme is self - improvement. He uses the knowledge from his future self to become a better shinobi faster.
Another theme is power. She may use her knowledge of the future to gain power or influence in the past. This could be political power, like influencing the decisions of the lords, or personal power, such as learning combat skills earlier. It's about how she can rewrite her own story with the advantage of hindsight.
One common theme is self - discovery. When Natsu goes back in time, he often learns more about himself, his powers, and his past. For example, he might find out things about his family or how he came to be who he is.
Regret is a very common theme. Since the characters are going back in time, they often think about the things they did wrong before and try to correct them.
Well, I'm not sure of specific 'the seven go back in time fanfiction' stories off the top of my head. But you can try searching on fanfiction websites like Archive of Our Own. There are often user - rated and reviewed stories there that might be really good.
One common theme is redemption. Jon often goes back to correct past mistakes, seeking to atone for things he did wrong in the original timeline. Another theme is the butterfly effect. His actions in the past can have unexpected and far - reaching consequences in the future.
One common theme is redemption. Ichigo might go back in time to fix his past mistakes, like not being able to save someone. Another theme is power - up. Since he has the knowledge of the future, he can train differently in the past and gain stronger powers. Also, relationship repair is a theme. He could go back to mend broken relationships with his friends or family.
Some common themes could be time travel adventures. Natsu might go back in time to prevent a disaster in the Fairy Tail world. Another theme could be self - discovery. As he travels back, he learns more about his past and his true potential.