Sakura may interact with the Akatsuki members in some 'sakura time travel naruto fanfiction'. She could try to stop them from causing chaos. For instance, she might try to persuade Itachi within the Akatsuki to change his plans. She could also interact with Pain. If she can understand his motives earlier, she might be able to prevent the destruction he caused in the original story. And of course, Sakura will continue to interact with her friends and comrades from the Hidden Leaf, like Shikamaru and Ino, who could also be involved in her time - travel - related plans.
Naruto, of course. Since they are in the same team in the original story, it's very likely that Sakura will interact with Naruto. She might try to change his fate or help him in a different way. Sasuke is also a main character she'll interact with. Maybe she'll try to prevent Sasuke from going down his dark path. And Kakashi, as their teacher, will also be involved in their interactions.
In this type of fanfiction, Sakura could interact with the Hokages. For example, if she travels back far enough, she could meet Hashirama and Tobirama. She might learn some ancient secrets from them. Also, she could interact with Jiraiya. Jiraiya could be a great help to her as he has a lot of knowledge and experience. He might also be interested in Sakura's time - traveling situation and offer some advice or training.
If the fanfiction has a more magical or fantasy element, it could be the magical creatures or spirits that Davis was associated with. Sakura Motomiya, when she replaces him, would start interacting with these beings. For instance, if Davis had a special bond with a certain forest spirit, Sakura would now have to build her own relationship with it. Her different personality might make the spirit react differently, either being more friendly or more cautious towards her.
Obviously, Naruto and Sakura would be the main characters. Naruto is the one who is 'over' Sakura, so his transformation in terms of his feelings towards her would be a central aspect. Sakura, too, would play a crucial role as the object of his former affections and as someone who might react to his new stance.
They are likely to interact with Naruto's past self. It would be an interesting dynamic as Naruto tries to explain things to his younger self without messing up the timeline too much. And Himawari would be there, perhaps teaching her young father some of her own jutsu.
Naruto could also be involved in interactions with evil Sakura. Naruto, being the protagonist, would likely try to understand why she has turned evil and might attempt to bring her back to the good side. Their interactions could be full of tension and emotional moments.
Definitely some of the Akatsuki members. Itachi could be one. He is a complex character with his own motives. His presence could add a lot of mystery to the story as Sakura might try to figure out his true intentions. Another could be Deidara. His explosive personality and love for destruction could create some intense confrontations with Sakura.
Obviously, Sakura would be one of the main characters. And the members of the Akatsuki would also be important. For example, characters like Itachi or Pain might play significant roles as they are key figures in the Akatsuki. They could be mentors or antagonists to Sakura depending on how the story is written.
Well, Karin is for sure a main character as she is taking over Sakura's position. Sakura, although being replaced, still has an important role as the benchmark for Karin's replacement. Then, other characters in their shared universe who interact with either of them could be main characters too. For instance, Naruto could be involved, seeing as he is friends with Sakura and may have some sort of reaction to Karin replacing her. Also, characters from their respective teams or groups might be main characters as they would be affected by this replacement.
Sakura could have interactions with the Weasley family. Ginny Weasley might become her friend and they could have girl - talk about magic and boys. Fred and George could also be part of her story. They might play some pranks on her at first but then become good friends. And don't forget Neville Longbottom. Sakura could help Neville gain more confidence in his magic abilities as they study together in the Hogwarts library.
The main characters would be the Uchicha family members. And depending on the direction of the fanfiction, there might be a character who is a symbol of sakura, like a girl named Sakura who has special powers related to the sakura. She could interact with the Uchicha family and be a key figure in the story.
In this fanfiction, Rock Lee could be involved. He would be cheering Sakura on wholeheartedly, and his positive energy might inspire the ANBU members under Sakura's command. Shikamaru, with his strategic mind, could be either an ally or a reluctant supporter. He might question some of Sakura's decisions from a tactical perspective. Additionally, Tsunade could be a background character, her influence on Sakura still lingering, and she could be a source of advice for Sakura when she faces difficult situations as the ANBU commander.