How would Harry and Neville's relationship change if they go back in time in fanfic?

Well, if Harry and Neville go back in time in fanfic, they could use their knowledge from the future to their advantage. Neville might be able to save his parents who were tortured by Bellatrix. Harry could also try to save Sirius earlier. They could also learn more about the secrets of Hogwarts that were lost over time.

Their relationship would likely become more complex. At first, they might be more united because they have a common goal of changing the past. However, as they face different situations in the past, their differences could start to surface again. For example, Sasuke might be more focused on revenge - related issues from the past, while Naruto would be more interested in saving lives. This could lead to some arguments between them.

Their relationship might become stronger. In the past, Naruto could show Kurama that he is more than just a host, and Kurama could see Naruto's potential to change things even at an earlier stage.

Their relationship could become stronger. Facing the challenges of the past together, they'd rely on each other more. For example, if they end up in a dangerous situation in the past, they'd have to trust each other completely to get out of it.

Their relationship would likely become more intimate and closer. With the pregnancy, they would have to rely on each other more. Neville might become more protective of Hannah.

In the past, their relationship could be more complex. Kakashi might be suspicious of Naruto's sudden appearance and his knowledge from the future. Naruto would have to prove himself to Kakashi. However, as they work towards a common goal, like saving Konoha from a threat in the past, they would gradually build trust. Their relationship could also change in terms of how they interact with others in the past. For example, they would need to pretend to be normal villagers or ninjas from that time, and this new situation would impact how they relate to each other.

Their relationship might become more complex. Since they'd be in a different time, they might rely on each other more. In their own time, they had different paths, but going back in time could force them to be closer. They might start to see each other in a new light, like Luke seeing Leia as more of a partner in adventure rather than just a sister.

When they go back in time, they may encounter situations where they have to protect each other. This could be a big turning point in their relationship. Let's say they go back to a time when there were dark wizards targeting their families. They would have to put aside their differences and fight side by side. This could lead to a complete transformation of their relationship. Draco might realize that Harry is not his enemy and Harry could see that Draco is capable of loyalty and self - sacrifice. It would be a very different dynamic from their relationship in the original timeline.

It's possible that there could be some strain on their relationships. The stress of being in a different time and the fear of changing things could cause arguments. Maybe they have different ideas about what they should do while in the past. For instance, Fred and George might want to have some fun and explore, while Harry is more focused on achieving a specific goal related to the future, which could lead to some friction between them.

Regarding his family, Hikaru could understand their support for his Go journey better. He might go back in time and be more open with them about his passion for Go. This could lead to his family being more involved in his Go - related activities, like attending more of his tournaments and providing more emotional support. Maybe his family could also play a role in promoting Go in the community because of Hikaru's influence.