It could be a new student at Hogwarts who hails from Camden. This student might bring with them a different perspective on magic, having grown up in Camden. They could be the one to lead the victory, using their Camden - born ingenuity to outwit the villains.
The main character could be a Muggle - born from Camden. Despite being new to the wizarding world, they have a strong sense of justice and determination. They might learn magic faster than others due to their eagerness to prove themselves, and ultimately be the key to achieving victory in a situation where the wizarding world is in chaos.
Maybe it's an older wizard who has been living in Camden for a long time. He or she could have been in hiding, but when a threat emerges, they come out of seclusion to use their vast magical experience and knowledge of Camden's magical secrets to secure the victory. For instance, they might know of a magical well in Camden that has the power to restore drained magic, which they use to help in a battle.
Perhaps it's a story of friendship and unity in Camden within the context of Harry Potter. There could be a group of friends from Camden who come together to form a sort of magical resistance. They might use their unique skills and knowledge of Camden (like its hidden alleys and old buildings that could have magical properties) to fight against an evil force that is threatening both Camden and the rest of the wizarding world.
The main character could be a battle - hardened general. He has seen many wars and is well - aware of the concept of a Cadmean victory. He tries his best to prevent his own side from achieving such a Pyrrhic victory. He might be a complex character with a troubled past, haunted by the memories of previous battles where victory came at a great cost.
The main character could be a ranger from a lost tribe. This tribe was known for their unbeatable fighting skills, and he is the last of his kind. He has a unique fighting style and a set of powers that are unknown to others. As he travels the land, he always wins his battles, whether against bandits, monsters, or dark wizards, and he gradually uncovers the secrets of his tribe along the way.
A lesser - known character like Ernie Macmillan from Hufflepuff could be the main character. As a prefect, he could bring out the unique qualities of Hufflepuff house. He might have to deal with issues like other houses underestimating Hufflepuff students. His story could focus on how he promotes the values of hard work, loyalty, and fairness within the house and the school as a whole.
Hermione could be a great main character. She's curious and intelligent, so she would be really interested in exploring the secrets of the diary. She could use her vast knowledge of magic to try and figure out how the diary works and what secrets it holds.
Harry Potter himself could be the main character as a revenant. Maybe he has some unresolved issues from his past, like his relationship with his parents. His revenant form could be on a journey to fully understand their sacrifice and his own place in the wizarding world's history.
It could be a younger sibling of one of the main characters in the original series. For example, Ginny's little sister who has big shoes to fill but also a great passion for Quidditch.
Hermione could be a great main character in an elementalist fanfiction. Her intelligence and thirst for knowledge would make her eager to learn about and master elemental magic. She could be the one to discover a long - lost elemental spell book and start exploring the powers.
It could be a new student at Hogwarts who has a natural talent for dealing with beasts. This student could be from a family that has always had an affinity for magical creatures but has kept it a secret until now.
A Muggle - born mouse. It could be a unique concept where a mouse from the Muggle world somehow ends up in the wizarding world. It would be interesting to see how it copes with all the magic and the rules of the wizarding society.