Often, there are also antagonist characters. For instance, a dark sorcerer who wants to use the power of the sakura reincarnation for his own evil purposes. This creates conflict in the story as the protagonists must protect the sakura spirit from being exploited.
Naruto can also be paired with Sakura in these fanfictions. Since they are such close friends in the original, in a reincarnation scenario, their friendship could potentially turn into something more romantic. They could support each other in different ways than in their past lives.
The dragon itself is, of course, a common character. Whether it's in its original form at the start or in its reincarnated state.
Sasuke is also frequently present. His complex relationship with Sakura can be further explored in the fanfiction. The reincarnated character could either get involved in their relationship or try to change the dynamics between them.
It's hard to say exactly who the main characters would be without reading the specific fanfic. But it could be a young woman who has memories of her past lives related to sakura. Maybe she's the one who is on a quest to figure out the significance of these memories.
Some fanfictions may include animal characters that are associated with the sakura. For example, a magical fox that guards the sakura grove or a bird that can communicate with those who possess the sakura power. These characters add an element of magic and mystery to the story.
Many fanfictions pair Ash, in his reincarnated state, with new characters as well. Sometimes there are powerful Pokémon trainers or even mysterious characters from different dimensions. These new pairings can introduce fresh storylines and dynamics, like the new character guiding Ash through his new, reincarnated journey or being in conflict with him over different goals.
In many fanfictions, the idea of Sakura being the reincarnation of Madara is used as a plot device. This can lead to some really interesting story developments. For example, it might change how Sakura interacts with other characters like Naruto and Sasuke. Her new 'reincarnation' status could give her access to Madara's powers or knowledge in some way. It also allows the author to play with themes of destiny, power, and self - discovery in a different way compared to the original Naruto story.
In many sakura haruno reverse harem fanfictions, Naruto and Sasuke are almost always there. Naruto's energetic and kind - hearted nature contrasts well with Sasuke's more brooding personality, creating an interesting dynamic around Sakura. Kakashi can also be part of it in some stories, with his mysterious and experienced character adding another layer to the relationships. And then there are often new male characters introduced, like a foreign shinobi who is attracted to Sakura's strength and beauty.
Sometimes, family members are common characters in these fanfics. Her parents or siblings might have strong opinions about her remarrying. They could be initially against it due to past experiences or family honor, or they could be very supportive, seeing it as a chance for Sakura to find true happiness again.
Harry Potter himself is often a common character. Since it's a reincarnation fanfic, he could be reincarnated in different forms or with different personalities. Hermione Granger is also frequently seen as she is a very important character in the original series. Her intelligence can play a big role in the new storylines that the fanfic creates.