Sometimes other characters like Minato might also be involved. Minato could be a part of the backstory, especially since he was Kushina's husband in the original story. His presence in the fanfiction can add an extra layer of complexity, like Kushina having to deal with her past feelings for Minato while falling for Naruto. Also, characters like Jiraiya could be included as Naruto's mentor, and his influence on Naruto could be a factor in Kushina's attraction to Naruto.
Sometimes, other characters from the Naruto universe might also be involved. For instance, Minato, Naruto's father and Kushina's husband, could play a role. Maybe the fanfiction could show how Minato would react to seeing Naruto and Kushina together, or how he would be part of their family dynamic in a different way than in the original story.
Obviously, Kushina and Naruto are the main characters. Kushina is at the center of the'regret' aspect, and Naruto is the one she has regrets about in relation to. Minato might also be a major character as he was Kushina's husband and Naruto's father. His relationship with both of them can be explored in the context of Kushina's regrets.
Obviously, Kushina and Naruto are the main focuses. Kushina because she's the one who is alive in this fanfiction concept, and Naruto because he now has his mother in his life. Their relationship is often explored deeply, showing how Kushina can guide Naruto in his ninja journey and in life in general.
Jiraiya could also be one of the main characters. He was Naruto's mentor and had a connection with Kushina's family. He could play a role in helping them adjust to the time travel and also use their knowledge to his advantage in some ways, like getting intel on future threats.
Kushina is a central character as the whole concept is about her remembering things related to Naruto. Naruto, being the subject of her memories, is also a main character. There might also be other characters like Minato, Naruto's father. Since Kushina was married to Minato, he could be part of her memories too. Also, Naruto's friends like Sasuke and Sakura could potentially be in the fanfiction as they are important people in Naruto's life and thus might be part of Kushina's recollections.
Obviously, Naruto and Kushina would be the main characters since it's about Naruto being Kushina's brother. But there could also be other important characters. Minato might be a significant character as he was Kushina's husband. Also, characters like Jiraiya could be involved, as he was Naruto's teacher and had a connection to Minato. And then there are Naruto's friends like Sasuke and Sakura, who could interact with Naruto in this new family - centered scenario.
Obviously, Kushina is one of the main characters. Naruto is also a central figure as her son. Since it's related to the Naruto universe, characters like Sasuke, Sakura, Kakashi might also be important in the fanfiction. They could interact with Kushina in various ways, like Sasuke might be skeptical of her at first, or Sakura could be eager to learn from her.
Another plotline might involve Kushina being brought back to life and getting to know Naruto as a young man. As she spends time with him, she discovers his determination and the way he has grown despite his hardships, which makes her develop feelings for him. For example, she could see how he interacts with his friends and how he's always there to protect them, and that could draw her to him.
Kushina is sometimes shown to be a bit overprotective in these fanfics. She doesn't want anything bad to happen to Naruto, so she might be a bit strict about who can come near him. And Naruto is often seen as having a lot of potential even as a baby, with his bright blue eyes full of wonder and a glimmer of the powerful ninja he will become.
Often, it portrays a very strained relationship. Naruto is likely to be confused and hurt by his mother's evil actions. He may try to reason with her at first, believing that there is still good in her.