Definitely Harry himself. Then, there could be his godfather Sirius Black if he was somehow brought back. His parents' old friends like Remus Lupin might also show up as they were like family to Harry. And of course, any remaining members of the Potter family line, such as distant cousins or aunts and uncles who were in hiding or just not known to Harry before.
Well, in this kind of fanfiction, the family reunion might be a chance for Harry to learn more about his family's history. Maybe he'd discover new magical abilities that run in the family. The reunion could be held at an old family estate that he's never been to before. And there would be a lot of introductions, as he meets cousins, aunts, and uncles he didn't even know existed. There might also be some family feuds that need to be resolved during the reunion.
Well, in the 'Harry and Hermione family reunion' fanfiction, it could be that they are reuniting after a long time apart due to some sort of magical crisis that had separated them. Their families might be a bit hesitant at first, but as they start sharing their experiences and the strong bond between Harry and Hermione becomes evident, everyone warms up. There could be magical displays for the kids, and they all might plan for future joint adventures or just simple family outings.
Well, it might involve the Potter family getting together. Harry could finally introduce his kids to some long - lost relatives. Maybe Sirius Black, if he somehow was brought back, would be there. They would all sit around the fireplace and talk about the old days, how they fought against Voldemort. And then they might start planning for the future of the wizarding family, like ensuring the kids get the best magical education and how to keep the family name honorable in the wizarding community.
In this kind of fanfiction, the main ones would be the Potter family. But it would also include Sirius Black if the story allows for his presence in some way, like a magical resurrection. Remus Lupin's family might be there too, if Tonks and their son Teddy were to be part of the reunion. And of course, the whole Weasley clan, from the eldest siblings to the youngest grandchildren, all gathering together to celebrate family.
Obviously, Harry and Hermione themselves are the central characters. Their spouses, if they have any in the fanfiction, would also be important. Their children would play a big role too, as they would be part of the new generation of the family. And of course, old friends like Ron, Ginny, and other Hogwarts alumni might make an appearance.
Once upon a time, the Granger family decided to have a reunion at their old family manor. Hermione Granger, now a successful witch, was excited to see her parents again. As the day arrived, hugs and tears of joy filled the air. They shared stories of their lives, with Hermione's tales of Hogwarts leaving her parents in awe. The family cooked together, using old family recipes, and spent the evening reminiscing by the fireplace.
Once upon a time, the Percy family decided to have a grand reunion. Percy, excited yet a bit nervous, arrived at the old family estate. His parents greeted him with warm hugs. Cousins he hadn't seen in years were there too, sharing stories of their adventures. They all gathered around a big table filled with delicious food, reminiscing about old times and making new memories. It was a day filled with laughter, love and a sense of belonging that Percy had missed for so long.
Well, there could be a lot of emotional reunions. Maybe Annabeth gets to see her long - lost relatives and they share stories about their family history. There could be some conflicts too, like old family feuds resurfacing.
Obviously, Annabeth's immediate family like her parents if they are alive in the fanfiction would be there. Her siblings too, if she has any. And then there could be her extended family such as aunts, uncles, and cousins.