Well, there could be several reasons. He might be deeply attached to the characters and stories in fanfiction. It offers him a unique form of escapism where he can explore different scenarios and relationships that are not possible in the real world. Also, he may have a community within the fanfiction world that he doesn't want to leave behind.
It could be that she simply wants to keep her real relationship with Edward private. Fanfictions might make her feel like her relationship is being overly exposed or misrepresented. For example, some fanfictions might add in elements that she finds uncomfortable or not true to their actual connection.
One reason could be that the fanfiction writer is trying to show Bella's growth in a different way. By not having her love Edward, it allows for a different exploration of her character. For example, she could be focused on self - discovery or other aspects of her life rather than the relationship. Also, it might be a reaction to the over - popularity of the Bella - Edward relationship in the original, and the writer wants to break away from it.
Maybe the fanfiction writer wants to explore different character dynamics. They might be trying to break the traditional 'Bella loves Edward' trope and create more complex storylines where Bella has different feelings.
The fanfiction allows for new relationships to develop. Minato could interact with characters in ways we never saw in the original plot. For instance, he could mentor characters other than his students. He could also have a role in resolving long - standing conflicts within the village, which adds a whole new layer of intrigue.
Perhaps Loki is forced to stay in Jotunheim. There could be a powerful spell or curse that binds him to the realm. This could lead to an interesting plot where Thor has to find a way to break the spell and rescue Loki. It would also give Loki a chance to explore his identity while being stuck there.
Perhaps in the fanfiction, Edward broke a significant promise to Bella. Promises are important in relationships, and if he failed to keep one, it could lead to her not forgiving him. For example, if he promised to always be there for her but then abandoned her in a time of need. Also, his over - protective nature in a wrong way could make Bella feel suffocated and less likely to forgive him.
It could be that there are external forces at play. Maybe there are other characters or some kind of dark secret in the fanfiction lore that forces Edward to leave Bella while she's pregnant. For example, there could be a threat from a rival group that says they'll harm Bella and the baby if Edward stays, and he thinks leaving will draw the danger away from them.
Maybe he would have a big impact on his family. For example, he could be there for Naruto as he grows up, guiding him and helping him become an even stronger ninja at a faster pace. He might also work with other clans to strengthen the bonds within the village.