Lambo could also be part of the story. His antics in the past could either cause trouble for Tsuna or, in a comical way, help Tsuna achieve his goals. For instance, his love for food might lead them to discover a hidden place or a secret item that turns out to be important in the grand scheme of things.
Hayato Gokudera would be a key character. In the time - travel scenario, he might be initially confused by Tsuna's changed behavior (due to his future knowledge). But then he would quickly side with Tsuna and help him in whatever plans he has. He could also learn from Tsuna's future self and become an even more powerful right - hand man.
Reborn is often involved. Since he is Tsuna's mentor, he could play a crucial role in guiding Tsuna during his time - traveling adventures. Maybe he has some knowledge about time travel that he imparts to Tsuna.
Another plot could be Tsuna traveling back to a time when his father was still around. He could get to know his father better and learn some hidden family secrets. This would not only strengthen their relationship but also give Tsuna an edge in his future as the Vongola boss. He might learn about some special powers or techniques that his father knew but never got to pass on to him in the original timeline.
In KHR Tsuna x Hibari fanfiction, the settings can play a huge role. For example, if it's set in the school environment of Namimori, their interactions would be shaped by the school rules and the presence of other characters. Some fanfictions might explore how their relationship evolves when they face a common enemy, like the Vongola enemies. This can bring out different sides of their personalities and how they support each other in tough situations.
With Reborn, you can develop his past. Maybe write a story where we learn more about his training and how he became the world - class hitman. This could add more depth to his character and also show how his past experiences influence his relationship with Tsuna. For example, if he had a difficult master - apprentice relationship in the past, it could make his bond with Tsuna even more special.
The theme of friendship - turned - more - than - friendship is also quite common in KHR Tsuna x Hibari fanfiction. They start as schoolmates or comrades in the Vongola family battles. As they spend more time together, feelings may develop that go beyond simple friendship. And of course, the theme of redemption can be there too. If one of them makes a mistake or has a dark past, the other can be a source of support and redemption.
Often, they focus on the unique bond between Tsuna and Chrome. It can be a deep friendship or something more romantic. The stories usually incorporate elements from the original work, like the mafia world setting and their special powers.
One common theme is friendship turning into love. Since they start as friends in the original work, many fanfictions explore how that relationship deepens into romantic feelings over time.
One common theme is growth. Both Tsuna and the OC usually go through personal growth as they interact with each other. For example, Tsuna might become more confident in his leadership skills with the OC's support.
One common theme is friendship evolving into love. They start as friends or at least acquaintances, and as the story progresses, their feelings change. For example, in many fanfictions, Tsuna might do something selfless for Hana that makes her see him in a new light.
Friendship is a common theme. Enma and Tsuna often form a strong bond that helps them through difficult situations. They support each other and learn from one another.