Dumbledore could also be an important character in this fanfiction. Since Sirius is often at odds with the wizarding establishment, his relationship with Dumbledore would be interesting to explore. Dumbledore might be a guiding figure, or there could be a power struggle between them as Sirius tries to take control in his own way.
In addition to Sirius, there could be original characters created by the fanfiction author. These could be new witches or wizards that Sirius meets on his journey of taking control. They might be people he has to convince to follow him or people who initially oppose him but later become his allies.
Obviously, Sirius Black is the main character. But there could also be other characters like Harry Potter, as Sirius has a strong connection to him. His friends from Hogwarts days might also make an appearance, such as James Potter in flashbacks.
One possible plotline could be Sirius taking control of a difficult situation within the wizarding world, like dealing with dark wizards. Maybe he uses his skills and knowledge to outwit them.
Obviously, Harry Potter is the central character as the title implies. He is the one who is taking control in the story.
Obviously, Harry Potter is the main character as it's about him taking control. Hermione Granger is likely to be an important character as well, she would probably be by Harry's side, offering her intelligence and support.
Obviously, Harry Potter is a main character as the title implies. But usually, his friends like Hermione and Ron are also likely to be important. They would be there to support Harry in his new role of taking control.
Obviously, the daughter of Sirius Black is the main character. She is often depicted as having some of her father's rebellious spirit. Her friends at Hogwarts also play important roles, like her best friend who might be from a different house, adding an element of inter - house friendship.
One great fanfiction where Sirius Black takes care of Hermione could be 'The Guardian'. In this story, Sirius steps in when Hermione is in a difficult situation at Hogwarts. He becomes like a mentor to her, protecting her from the threats of the dark forces that are starting to lurk around the school. He teaches her some advanced magic that she wouldn't have learned otherwise.
Obviously, Harry would be the main character. He is the one taking control of his life. Hermione and Ron would most likely be important characters too as they are Harry's closest friends and would be involved in his journey. Dumbledore could also play a role, perhaps as a mentor figure that Harry starts to question and break away from as he takes more control.
Obviously, Harry Potter and Sirius Black are the main characters. Harry is the young wizard who has lost his parents and now is adopted by Sirius. Sirius, on the other hand, is Harry's godfather who takes on the role of his adoptive father. There may also be other characters like Hermione and Ron who could still be Harry's friends and play important roles in the story, providing support and getting involved in their adventures.
Remus Lupin is often present. He was one of Sirius' old friends and a fellow Marauder. Their friendship can be delved into deeper, especially considering the complex history between them. Dumbledore is another common character. He plays an important role in the wizarding world and his interactions with Sirius can add depth to the story.
Obviously, the daughter of Sirius Black is the main character. But often, characters like Harry Potter, Hermione Granger, and Ron Weasley also play important roles as they are her contemporaries at Hogwarts. Her godfather, Remus Lupin, might also be a significant character as he was close to her father.