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.
Well, in a 'Harry Potter takes control fanfic', it usually means that Harry Potter is portrayed in a more dominant or in - control role compared to the original series. Maybe he takes charge of situations earlier, or has more power over his destiny.
In a fanfic where Harry Potter takes control of Gringotts, there are numerous possibilities. He could use the influence of the bank to unite the wizarding community. For example, by providing loans or financial support to small magical businesses that were affected by the war. He could also use the ancient magic and artifacts stored in the vaults for research purposes, to further understand the history and magic of the wizarding world. This could lead to new spells and magical techniques being discovered. Also, he might be able to set up a system to monitor the flow of dark magic items in and out of the vaults, thus making the wizarding world a safer place.
One great 'Harry Potter Takes Control' fanfiction is 'The Power Within Harry' which shows Harry taking control of his destiny in a unique way. It has him making decisions that are different from the original story, like taking charge of his magical training earlier.
The element of breaking free from expectations is crucial. In the original story, there were a lot of expectations placed on Harry. In fanfic, he can shatter those. For example, if the wizarding world expects him to be a certain kind of hero, he can redefine what that means. Also, the development of his own magical style is important. He doesn't have to use the same spells as everyone else. He can create his own signature magic, which shows his control over his life and his magic.
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.
One of the best elements is seeing Harry's character growth. In many such fanfictions, he becomes more self - assured and decisive. For example, in 'Taking the Reins, Harry', he stops relying on others so much and starts to think for himself.
Perhaps Harry takes control in a way that he unites different wizarding factions that were previously at odds. He could use his influence to promote peace and cooperation among them, leading to a more harmonious wizarding world.
Well, in such a fanfiction scenario where the Horcrux takes control, it would be a total chaos. Harry, for instance, if under the Horcrux's control, could turn against his friends. His moral compass, which is usually so strong, would be distorted. The Horcrux might try to use Harry's powers for its own evil purposes, like trying to resurrect Voldemort in a more powerful form or causing destruction within Hogwarts. It would also create a great internal struggle within Harry as he tries to fight against the Horcrux's influence.