There's a good chance that his friends like Ron and Hermione would also be main characters. They were always by his side in the original series and would probably play important roles in this fanfic as well, perhaps helping Harry explore and understand his new - found aspects of his magic.
It's possible that some new characters could be introduced in 'harrys magic is alive fanfic'. These could be other wizards or witches who are either intrigued by Harry's unique magic or are involved in the situations that Harry's magic gets him into. Maybe there's a mysterious old wizard who has some knowledge about Harry's special magic and becomes a mentor - like figure.
Well, in 'harrys magic is alive fanfic', it might be fascinating to see how Harry's relationships are affected by his ever - evolving magic. His friendships with Ron and Hermione could take on new dimensions as his magic grows and changes. It could also explore his connection to the wizarding community in a more profound way, like how his magic might inspire other young wizards or how he uses it to face new threats to the wizarding world.
Aside from Harry's children, their friends at Hogwarts could also be main characters. For instance, a new character who comes from a different wizarding family but has a special connection with Harry's kids. Maybe they team up to solve a mystery in the school, like a hidden chamber or a strange magical phenomenon.
It could be Hermione, if it's related to the Harry Potter universe. She is extremely brainy and would fit the description well. There might also be other new female characters who are introduced specifically in this fanfic to add more depth to the story.
The main characters are likely Castle and Kate. Castle is the one who believes Kate is alive, so he's a central figure in this fanfic. Kate, whether she's present or just the subject of Castle's belief, is also a main character as the story revolves around her being alive.
I'm not sure specifically as it depends on the fanfic. It could be a young wizard or witch as the main character who is drawn to the magic in the stars.
Most likely Bendy would be one of the main characters. Since the story is based on Bendy and the Ink Machine, he is a central figure in the game and would probably be in the fanfic too. Also, characters like Henry, who is often the protagonist in the game, might be there as well.
There's not enough information to know who the 'harrys' are. It could be a name unique to a particular story or community.
One common plot element is that Harry is usually in a vulnerable situation at the start. For example, he might be alone in a dark alley in the wizarding world.
One possible main character could be a forest - dwelling elf. Elves are often associated with archery, and in this 'arrow magic fanfic', they could have a special connection to the magic arrows. The elf might be on a quest to find the origin of the arrow magic to save their forest from a dark curse. Additionally, a human ranger who has befriended the elves could also be a main character. They would team up with the elf to explore the mysteries of the arrow magic and fight against any threats to their shared world.
Harry Potter would most likely be one of the main characters as it's in the title related to him. He would be the central figure around which the magical kaleidoscope of events unfolds.