In addition to the ones mentioned, Dumbledore could be a main character in some fanfictions. He knew Flamel, so he could play an important role in stories about Flamel. Voldemort could also be a main character as he was after the Philosopher's Stone, and his actions could be intertwined with Flamel's story. There could also be original characters created by the fanfiction authors who interact with Flamel and the other known characters.
Obviously, Harry Potter and Nicholas Flamel would be the main characters. Harry as the apprentice and Flamel as the mentor.
Obviously, Harry Potter is one of the most important characters. Then there are the Flamels. Nicolas and Perenelle Flamel are central as they are the ones adopting Harry. Dumbledore might still play an important role as he has a connection to Harry and also to the Flamels in the wizarding world. Voldemort would also be important as he is Harry's main enemy, and the change in Harry's situation due to the adoption could affect their ongoing battle.
Obviously, Harry Potter and Nicolas Flamel are essential. But also including characters like Hermione Granger would be great. Hermione's thirst for knowledge would make her a perfect student of Flamel's teachings.
It could be an original character created just for the fanfic. Maybe a young wizard or witch who has a special talent for alchemy and catches Flamel's eye.
In some Harry Potter Flamel fanfiction, Flamel is depicted as having a connection to different magical realms. He might travel to these realms in search of ingredients for the Philosopher's Stone. There could be a story where he teams up with Hermione to research some ancient alchemy texts that could lead to a new discovery about the Stone. Also, there are fanfictions that show Flamel's backstory, like his family and how he got into alchemy in the first place. His family might have a long - standing tradition in alchemy, and he is carrying on the legacy.
One common theme is the power of the Philosopher's Stone. Since Flamel is associated with it, many fanfictions explore how the Stone's power can be used or misused. For example, some stories might have villains trying to steal it again for their own dark purposes.
Yes, there could be. For example, the plot might revolve around the train being the only way to reach Flamel's hidden lair. The characters would then have to overcome various obstacles on the train to get there.
The idea of Flamel's influence on the wizarding world is also common. His knowledge and power are so great that fanfictions may show how he affected events in the past, present, or future of the wizarding world. For example, some fanfics might suggest that he had a hand in the founding of Hogwarts or in the development of certain spells.
It could be in a magical alternate universe. Maybe a place where the rules of magic are different and allow for such a transformation.
One popular 'Harry Potter Nicolas Flamel' fanfiction is 'The Alchemist's Legacy'. It delves into Flamel's backstory and his connection to the wizarding world beyond what was shown in the original books. It's a great read for those who want to explore more about this mysterious character.