It might turn into a distant but polite relationship. Harry has his own life in the wizarding world now, and he may not want to be too involved with the Dursleys. But out of a sense of family (even if it was a very difficult family relationship), he would be polite when they meet. The Dursleys, on their part, might also be more cautious in their behavior towards Harry, realizing that he is no longer the powerless boy they once knew.
When Luffy and Nami meet again after 2 years in fanfiction, their relationship is likely to strengthen. Nami, having spent two years honing her skills, would be an even more valuable asset to Luffy and the crew. Luffy's growth in power and leadership would make Nami feel more secure. They would communicate better, with Nami being more confident in voicing her opinions to Luffy, and Luffy being more receptive. This new dynamic would enhance their relationship and contribute to the overall success of the crew's future adventures.
Their relationship might develop more deeply. They have both been through a lot during the war, and this shared experience could bring them closer. They would start to understand each other on a whole new level. For example, Harry might see Ginny's strength in a different way, and Ginny would see Harry's vulnerability more clearly. This new understanding would strengthen their bond.
In such fanfiction, the story might change the original relationship by having the Dursleys show kindness early on. For example, they could provide Harry with a warm welcome when he first arrives at their home, instead of making him live in the cupboard. This alteration can lead to a different emotional growth for Harry, as he doesn't have to endure the same level of neglect and abuse. It also changes the dynamic of the entire wizarding world story, as Harry's home life is a big part of his character development.
It could become more complex. As adults, they have different responsibilities and experiences. Their relationship might start off a bit strained as they try to fit into each other's new lives. But eventually, they could find a new level of understanding and respect for each other.
Luffy might be more confident and less like a little kid around Shanks. He has grown a lot, and Shanks would notice this. Their relationship could become more of an equal partnership in terms of respect.
Well, their relationship would likely evolve. Harry would be overjoyed to meet his parents, and Hermione would be happy for him. But at the same time, she would also be cautious and try to make sure that everything goes smoothly. They would have to work together to ensure that the meeting doesn't disrupt the fabric of the fanfiction world too much. This would require a lot of communication and trust between them, which could ultimately strengthen their bond.
It could develop very smoothly. They already have a strong foundation of love, so when they meet, they just pick up where they left off and become even closer.
They could become study partners. Since they meet on the train, they might realize they can help each other out in different subjects at Hogwarts.
They might share a very emotional moment. Harry could finally let go of all the war - related stress and just be himself with Ginny. He might tell her about all the things he couldn't during the war, like his real fears and hopes for the future. And Ginny would be there for him, comforting him and showing her love in a more peaceful and free environment.
It depends on the specific fanfiction. Some might show them having a bit of a rough start. For example, Ginny could be angry that Harry distanced himself during the war for her protection. But then they would talk it out, and realize that they both still love each other deeply. From there, they would start to work on their relationship. They might go on adventures together, rediscover their shared interests, and their relationship would progress as they create new memories together after the war.