Well, it could be that as time passes in the fanfiction world, Hermione witnesses Harry facing great challenges alone. She might feel guilty for not being by his side and regret her rejection. Also, perhaps she starts to have deeper feelings for Harry that she didn't recognize before, like seeing his bravery in a new light and wishing she hadn't turned him down.
It could be that she sees the pain she caused Harry and it makes her feel guilty. In the story, perhaps she was influenced by others' opinions of Harry and didn't trust her own long - standing friendship with him. When she finally comes to her senses, she regrets all the hurtful things she said or did.
In some fanfictions, Ginny may reject Harry because she wants to focus on her own personal growth. She might feel that a relationship with Harry at that time would hold her back from achieving her own goals, like becoming a great Quidditch player or an accomplished witch in her own right. So, she decides to reject him to pursue her own dreams first.
In the fanfic, Hermione might regret choosing Ron over Harry because Harry has a different level of understanding when it comes to her academic pursuits. Harry, having faced the challenges of fighting Voldemort from a young age, might have a deeper respect for Hermione's thirst for knowledge and her need to constantly learn and improve. Ron, on the other hand, sometimes showed impatience with Hermione's studious nature.
Hermione's regret would likely create a lot of tension at first. Harry may be confused or even a bit resentful. But as time goes on, it could lead to a more complex and interesting relationship. Hermione might be more open about her feelings, which could make Harry re - evaluate his own feelings towards her. And this would completely change the way they interact with each other compared to before her regret.
Another reason might be related to the events that unfold after the rejection. For example, Naruto might go on to do extraordinary things and form closer bonds with other characters. Sakura could feel left out or jealous, which then leads to her regret. Also, she might have some self - realization about her own feelings at the time of rejection, thinking that she was influenced by wrong factors like social status or her own naivete.
One reason could be his status as the Boy Who Lived. In the original story, Harry has this special aura about him, and in fanfiction, Hermione might be drawn to that in an obsessive way. Also, his bravery and leadership qualities could be factors that make Hermione overly interested in him.
One possible reason could be that he's been influenced by some dark magic or a spell that makes him act out of character. Another reason might be extreme jealousy, say if Hermione is getting more recognition in the wizarding world than him for some time and he lashes out in a moment of weakness.
In fanfiction, it could be part of a developing relationship. If the author is exploring a romantic angle between Harry and Hermione, a touch in class could be a subtle way of showing their growing closeness. It could also be a way to show their strong friendship. For example, they might be working on a group project in class and Harry touches Hermione's hand to pass her a needed ingredient or tool, which shows their seamless cooperation and deep bond.
It could be due to a misunderstanding. Suppose Ron overhears a conversation between Harry and Hermione that he misinterprets completely. He might think they are plotting against him or don't really consider him a true friend. So in a fit of anger and hurt, he decides to betray them.
Another reason could be a rift in their friendship caused by outside factors. For instance, if the wizarding community starts to turn against Harry because of false rumors or misinformation, Hermione might find it too difficult to stand by him. She may fear for her own reputation or safety, and this could lead to her abandoning Harry.