He could start a business in the area of defensive magic. Given his own experiences with Voldemort and the Dark Arts, Harry is well - equipped to teach others how to defend themselves. He could open a store that sells all kinds of defensive magic items, from protective cloaks to anti - Dark Arts spells in a book form. He could also offer personal training sessions where he teaches people how to use Patronuses and other powerful defensive spells.
A magic education company. Harry has had a unique educational journey at Hogwarts. He could start a company that offers supplementary magic courses. For example, advanced Defense Against the Dark Arts for those who want more in - depth knowledge, or courses on the history of magic for those who are interested in the past of the wizarding world. It could also have a virtual Hogwarts experience for young witches and wizards who are not old enough to attend the real Hogwarts yet.
Well, he could open a magical creature adoption center. He'd use his knowledge of Hogwarts' grounds and the Forbidden Forest to rescue and rehabilitate magical creatures. Then he'd find suitable homes for them among wizarding families. It would be a great way for him to give back to the magical community and also educate people about proper care of these unique beings.
Well, perhaps Harry starts a factory to produce anti - dark magic devices. He uses his knowledge of the dark arts and his experience fighting Voldemort. He could bring in Hermione to help with the research side of things, and Ron to manage the day - to - day operations. The factory might be a target for dark wizards who don't want such devices to be widely available.
Perhaps the grey faction would focus on magic that is neither clearly good nor bad. Harry could start exploring grey areas of magic that have been long forgotten or shunned. He might team up with some characters who were previously on the fringes, like those who practice magic that is not strictly legal but not necessarily evil. The fanfiction could then be about their journey to gain acceptance for this new way of thinking within the wizarding community.
One possible plot could be that Harry uses his skills from fighting Voldemort and his knowledge of the wizarding world to form a sellsword company. He might recruit some of his old Hogwarts friends like Ron and Hermione. They could offer protection services to wizarding families or even to magical creatures. For example, they could protect a family of centaurs from poachers. The company could also get involved in solving magical disputes in a more hands - on way than the Ministry of Magic usually does.
Hermione would be an obvious choice. With her intelligence and vast knowledge of magic, she could handle the more academic and research - related aspects of the business. For example, if they were starting a magical library business, Hermione would be in charge of cataloging and sourcing rare books. She could also help with any legal or ethical issues that might arise in the wizarding business world.
One possible plot could be that Harry, after defeating Voldemort, decides he wants to do something different. He uses his Triwizard Tournament winnings to start a broomstick - making business. He teams up with some of the best broomstick makers in the wizarding world and creates a new line of broomsticks that are faster and more maneuverable. However, he faces competition from established broomstick companies who try to undermine his business.
He could meet a brilliant but eccentric teacher. This teacher might be an expert in a very rare branch of magic that Harry has never heard of before. The teacher could take Harry under their wing and teach him things that Dumbledore or the other Hogwarts teachers never did.
Well, he might make new friends. In a new school, Harry would be exposed to different students and personalities. He could meet a group of outcasts who are actually really powerful in magic but are shunned for some reason. They might form a secret club together to practice unique spells.
In this 'Harry starts a rebellion' fanfic, it could be related to the treatment of non - pure - blood wizards. Harry, having faced discrimination himself, might start a rebellion to demand equal rights for all wizards regardless of their blood status. He could organize protests and use his influence to make the wizarding world more inclusive.