In the fanfiction, Hinata may regret leaving Naruto because she sees how he has influenced the village and those around him. His positive energy and leadership might make her realize that she wants to be a part of his world. Also, she could be regretting it because she has seen other characters getting closer to Naruto in her absence, and she feels a sense of jealousy or loss. She might now understand that she made a hasty decision to leave without considering all these aspects.
One possible reason could be that she realizes she truly loves Naruto too much to be apart from him. Maybe she left because of some misunderstanding or external pressure, but then comes to understand that her place is by his side. Another reason might be that she sees how much Naruto has grown and changed, and regrets not being there to support him during that journey. Also, she could have found that life without Naruto is just not as fulfilling as she thought it would be.
One reason could be the motherly love. Kushina always loved Naruto deep down. Leaving him means missing out on his growth and important moments in his life. Another reason might be realizing the hardships Naruto faced without her presence. She probably feels guilty for not being there to protect him from the loneliness and the many challenges he had to endure in the village.
One possible reason could be her deep love for Naruto. Despite her actions, she realizes that Naruto is the one she truly wants. Cheating goes against her values and her feelings for him, so she regrets it as she understands the harm it has caused to their relationship.
It could be due to miscommunication. Suppose there was a misunderstanding between her and Naruto. For example, Naruto might have said something that Hinata misinterpreted as him losing interest in their relationship. This confusion could have led her to seek comfort in another person, which unfortunately led to cheating.
One reason could be to find a more peaceful place. Maybe after all the chaos in Konoha, they just want a quiet life away from it all. They might also leave to explore the world and discover new things together, like new jutsus or different cultures.
One possible reason could be that Naruto has a dangerous mission that only he can undertake. The safety of the village or the greater good might demand his immediate departure, even though it's hard for him to leave Hinata in such a state.
Perhaps she left for what she thought were the right reasons at the time, like following her own path or someone else's influence. But then, she discovers that life without Naruto is lacking. She misses his unwavering support, his positive energy, and his ability to always see the best in her, which leads to her regret.
Well, it can add a lot of drama to the plot. For starters, it could lead to a reconciliation arc between Hinata and Naruto. Their relationship would be in a state of flux, with Naruto perhaps being initially hesitant to forgive or trust her again. This would create tension and anticipation for the readers. Also, Hinata's regret might make her more determined to make amends, which could lead to her taking bold actions to get back into Naruto's good graces and the story's main events.
One reason could be that Naruto finally realizes Hinata's true feelings for him. After years of her being by his side, supporting him silently, and he may have taken her for granted or even been unkind without fully understanding her depth of emotion. Another aspect could be that as he matures, he sees how his actions, perhaps his obliviousness or his focus on other things, have hurt her. It's like when you grow up and look back at how you treated someone who truly cared for you, and you feel ashamed.
One reason could be that Naruto might feel he has outgrown Jiraiya's teachings in the fanfiction. He may want to explore his own path independently. Another possibility is that Naruto gets involved in a mission or a situation where he has to part ways with Jiraiya for the greater good. For example, if there is a threat in a far - off land that only Naruto can handle, and Jiraiya has other commitments elsewhere.
One reason could be to seek more power. In some fanfictions, Naruto might feel that the Leaf doesn't offer enough resources or training for him to reach his full potential. So he decides to leave to find a place where he can grow stronger.