There could be Sakura's friends or comrades who might be affected by her decision to abandon the village. For example, Naruto or Sasuke could be characters involved. They might try to understand her reasons or even try to persuade her to come back.
It's possible that her family members play significant roles. If she has a family in the village, their reactions to her leaving would be important. They could be either supportive or against her decision. And also, there could be a mentor - like figure in the village who she was close to, and her departure from the village could be a big shock to this person, making this mentor a key character in the story.
Perhaps there are some original characters created by the fanfiction author. Maybe a mysterious figure who has some connection to Sakura's past and is the reason she abandons the village. Or it could be a group of villagers who are not so friendly towards Sakura and their actions push her to leave, and these villagers could be important characters in the story as well.
In this 'sakura abandons the village fanfiction', it might be that Sakura abandons the village due to a rift in relationships. Maybe she had a falling - out with the village leaders or some of her peers. It could also be related to a discovery she made about the village's secrets that made her feel she no longer belonged there. For example, if she found out the village was involved in unethical practices that she couldn't tolerate.
It could be a male lead, like a charming and brave knight - in - training if it's in a medieval - like fantasy setting. He might be on a quest and needs Sakura's help, and after some persuasion, she finally says yes. And through their journey together, they develop a deeper connection.
There could be a kind wizard who tries to help Sakura turn back into a human. This wizard might be the key to solving the mystery of her transformation.
Since the title mentions 'sakura prodigy', Sakura is likely to be the main character. But without reading the fanfiction, it's hard to say if there are other important characters. There could be antagonists who oppose Sakura's journey, or perhaps she meets some companions along the way who also don't belong to a village.
There could be her family members. Her parents might play a role in either supporting or not believing her new - found ability. And her siblings could be either jealous or in awe of her. Also, there could be a wise old man or woman in the village who has some knowledge about seeing the future and can guide her.
One of the main characters could be Sakura's mother. Mothers are often intuitive about their children's problems. She could be the one who eventually helps Sakura open up about her self - harm. Then, there might be a new acquaintance in Sakura's life, someone she meets randomly. This person could have had a similar experience in the past and be able to offer unique advice and support to Sakura.
Tomoyo would also be an important character. She would be very worried about Sakura. She might use her skills in making costumes to create some special baby clothes for Sakura. And she would be constantly by Sakura's side, taking care of her and trying to comfort her.
Well, there could be Naruto. Since he's one of Sakura's closest friends in the Naruto universe. He might be the one who Sakura says something to, and then he could be confused or hurt by it. He could also play a role in helping her realize her mistake.
Sakura herself could be the main character, of course. Maybe we could also have her best friend from the series as the main character, experiencing a year in Sakura's world from their perspective. Another option could be a new character introduced specifically for this fanfiction, someone who is drawn into Sakura's orbit.
One possible reason could be that Sakura realizes she has different goals or values that are not compatible with being around Naruto. Maybe she discovers a new path in life that doesn't involve him, such as focusing on her own medical ninja career without Naruto's chaotic lifestyle interfering.