There could be original characters created specifically for the fanfiction. For instance, a young wizard or witch who discovers they have the power of the 'Lord of Fire' and becomes involved with Harry and his friends. They might bring a fresh perspective and new storylines to the fanfiction.
Voldemort or other dark wizards might be main characters as well. They could be seeking the power of 'Lord of Fire' to increase their strength. This would set up a great conflict as the heroes have to stop them from getting this powerful force, and there would be a lot of interesting character interactions and power struggles.
Harry Potter himself is often a main character. Writers might give him new abilities related to fire in the fanfiction. Hermione could also be a main character, using her intelligence to figure out how to deal with the new fire - based magic.
Harry Potter himself is often a main character. Since he's the hero of the original series, in fanfictions related to 'Harry Potter Lord of Hell', he might be the one to take on the lords of Hell or get involved in the Hell - related plot. Hermione and Ron are also likely to be main characters as they are Harry's closest friends and would support him in any adventure, including one that involves Hell.
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 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.
Well, of course, Harry Potter and Buckbeak are the main ones. But often Hermione and Ron also show up. They might be helping Harry with his adventures involving Buckbeak or be worried about the risks Harry is taking with the hippogriff.
Severus Snape is often a key character in these fanfictions. His complex relationship with Harry can take on new dimensions when it comes to forsaken magic. He might have some hidden knowledge about it or be involved in a plot that involves the forsaken aspects of the wizarding world. And of course, Dumbledore might also play a role, either through his past actions related to the forsaken magic or through his posthumous influence on Harry.
Well, Harry is almost always a key figure. He could be seen training under a samurai master in some fanfictions to gain new powers or a different perspective on magic. Hermione might be portrayed as the one who studies the samurai culture deeply, trying to find connections between their magic and the samurai way. Another character that often shows up is Dumbledore. He could be the one guiding the integration of the two cultures, using his wisdom to ensure harmony between the wizarding world and the samurai - inspired elements. There may also be a samurai - style villain, someone who challenges the values of both the Harry Potter world and the samurai code.
In some 'in noctem Harry Potter fanfiction', Severus Snape can be a main character. His complex relationship with Harry and his own mysterious past can be explored in the context of the night. For example, a fanfiction could show Snape patrolling the castle at night and having an unexpected encounter with Harry that reveals a new side of their relationship.