The Basilisk from the Chamber of Secrets also features a lot. Fanfics might give it a different backstory or a different role in the wizarding world. For example, it could have been an ancient guardian that was misused by Salazar Slytherin's descendants.
Harry Potter himself is often a main character. Since he has such a central role in the original series, it makes sense that he would be a key figure in afterlife fanfics. Hermione and Ron might also be there, as they are Harry's closest friends. Dumbledore could also be a prominent character, as his wisdom and influence would likely carry over into the afterlife.
In many 'harry potter epilogue fanfic', aside from the kids, the original characters like Harry, Hermione, and Ron also make appearances. They are shown as mentors or just as parents in the background. Sometimes, Draco Malfoy might also be included, either as an old acquaintance or as someone who has changed and is now more involved in the new generation's lives. His son Scorpius could be a key character too, interacting with the Potter and Weasley kids.
Obviously, Harry Potter himself is often a main character. After all, the whole story revolves around him in the original series. Hermione Granger and Ron Weasley are also very common. They are Harry's closest friends, so it's natural for them to be in fanfics as well.
Dumbledore is often a main character in Harry Potter 1945 fanfiction. Since he was around during that time, many stories explore his youth, his friendships, and his early battles against the dark forces.
Obviously, Harry and Ginny are very popular. Their relationship and their journey into parenthood are fascinating to many fans. Hermione and Ron are also commonly featured, as fans love to imagine how they would raise their children, with Hermione's intelligence and Ron's humor and loyalty being passed on.
In a lot of 'Harry Technomancer Fanfic', Neville can be an important character. He might be someone who discovers a hidden talent for technomancy under Harry's guidance. And then there are the teachers. Dumbledore could play a role, perhaps guiding Harry on how to use his technomancy for the greater good of the wizarding world. Snape might also be involved, either as an antagonist or an unexpected ally when it comes to Harry's new powers.
Obviously, Harry Potter himself is the central character as 'Lord Potter'. Then there are his friends like Hermione and Ron. In some fanfictions, they play different roles. Hermione might be more involved in researching the Potter family history and helping Harry understand his new title, while Ron could be by his side in battles, using his Weasley family's unique skills.
Well, of course, Harry Potter himself is often in these fanfictions. He might interact with the Hatter, perhaps being intrigued by the Hatter's strange hats and the magic they possess. Hermione Granger could also be a main character. She would be interested in studying the unique magic of the Hatter's creations and might even try to reverse - engineer them to understand how they work.
Harry Potter himself is often a main character. After all, it's a Harry Potter fanfiction. He is likely to be the one facing the challenges related to the mist.
Dumbledore can also be a main character in such fanfictions. He might have known more about the Lightning Bolt scar than he let on in the original series. Fanfiction could explore his past interactions with Harry's parents regarding the scar and how he was secretly guiding Harry towards unlocking the full potential of the Lightning Bolt.