Since I haven't read it, I can't say for sure. But it could be some of the well - known characters from the original series like Harry, Hermione, or Ron.
Well, without having read this particular fanfiction, it might involve a spell or a magical object that enables the main character to grow young. Maybe it's a story about a wizard who has grown old and weary from years of fighting dark magic and discovers a hidden secret in Hogwarts that allows them to turn back the clock on their age. It could also explore the consequences of such an action, like how it affects relationships with other characters or the balance of magic in the wizarding world.
Hermione could be another main character. Maybe she discovers what's happening to Harry and the author and tries to find a way to reverse it or at least understand it better. She could use her vast knowledge of magic to research the phenomenon.
There could also be some minor characters from the Marauders' era that might become more prominent. For example, Lily Evans, Harry's mother. Her relationship with James and how she might interact with Harry in this strange time - traveling or spirit - meeting scenario could be really interesting. And then there are the Hogwarts professors from both eras that could be involved, like Professor McGonagall, who could either be a guiding force or be a bit skeptical of Harry's new interactions.
There could also be other supporting characters. For instance, some of Harry's friends from Hogwarts like Ron and Hermione might make an appearance. They could be skeptical of Teddy at first or be involved in the adventures that Harry and Teddy go on. Also, Teddy's family or friends might be mentioned or even play a small part in the story, which could add more depth to his character.
The main character is often the one the 'Magical Me' is about, which could be a student at Hogwarts like Harry, Hermione, or Ron. They are central to the fanfiction as it explores their personal experiences.
Well, Harry Potter himself could still be a main character. He might be leading the revolution, using his fame and experience to inspire others. Hermione would also be important as she could be the brains behind the strategic planning, coming up with ideas on how to change the system.
Neville Longbottom could be a central figure in some Harry Potter Rebels fanfiction. He has shown great courage and the ability to stand up against the dark forces. In fanfictions, he might lead a rebellion against some corrupt elements in the Ministry of Magic. His growth from a shy boy to a brave hero in the original series gives him great potential to be a main character in these rebellious stories. And Luna Lovegood could also be important, with her unique perspective and disregard for convention, she could inspire others to rebel in the fanfiction world.
Another possibility is a new character created specifically for this fanfiction. This character could be a scientist or a wizard from a different part of the world who has knowledge of both nanotechnology and magic, and they bring the concept of nanobots into the Harry Potter universe.
Obviously, Harry Potter and Marris are the main characters. Harry is the well - known boy wizard, and Marris is the character specific to this fanfiction. There may also be other characters from the original Harry Potter series like Hermione and Ron, who might play supporting roles in the fanfiction.
Obviously, the grandchildren of Harry Potter are main characters. They often have names that are related to the Potter family traditions. There could also be their friends at Hogwarts, who might be from different wizarding families or even Muggle - borns.