Luna Lovegood could also be the main character with silent rage. Maybe she's angry about how others make fun of her beliefs and oddities. In the fanfiction, she could be using her unique perspective and her rage to come up with new spells or ways to show that her way of thinking has value. For instance, she might use her rage to develop a spell that makes people see the beauty in things they previously mocked.
Perhaps in this fanfiction, Hermione could be the one with silent rage. She might be angry about the discrimination still existing in the wizarding world against Muggle - borns. So, she could be silently working on a way to change the laws and mindsets. She might start by writing anonymous articles in the Daily Prophet, using her extensive knowledge to subtly shift public opinion.
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.
Neville could also be a main character in this type of fanfiction. He could stumble upon a clockwork - related mystery in the Hogwarts gardens. Maybe there are some clockwork - powered plants that are acting strange. Neville, with his new - found confidence, takes it upon himself to solve the mystery and in the process, uncovers a deeper secret about Hogwarts and its connection to clockwork magic.
A young witch who was raised by dragons after being lost in the mountains as a child. She returns to the wizarding world as a dragonspeaker and has to adapt to human society while also using her skills to protect both the dragons and the wizards. She could be the main character as she bridges the gap between the two worlds.