Ron could also be one of his colleagues. He might be the Care of Magical Creatures professor. Ron has had his fair share of experiences with magical creatures, from Scabbers to Buckbeak. His laid - back and friendly nature would make him popular among the students.
Hermione would be a likely colleague. Given her thirst for knowledge and academic excellence, she might be teaching a subject like Ancient Runes or Arithmancy. They could often collaborate on projects related to the overall betterment of Hogwarts' curriculum.
Hermione would be a likely colleague. She's extremely intelligent and could be teaching a subject like Transfiguration or Ancient Runes. She would often share her vast knowledge with Harry and they could collaborate on projects for the students. Another could be Neville. He could be the Herbology professor. Given his own experiences with plants, especially the Venomous Tentacula, he would be great at teaching students how to handle dangerous plants safely.
Ron could also be there. Maybe he's the keeper of the Gryffindor Quidditch team still, but also helps out with some practical magic lessons. He could teach students about the magical creatures he encountered during his travels, like how to handle a Hippogriff properly. He and Harry would often joke around in the staff room, reminiscing about their school days.
Hermione would be a likely colleague. She's highly intelligent and could be teaching a subject like Ancient Runes or Arithmancy. Ron could also be there, perhaps as a flying instructor or teaching something related to magical creatures. Neville might be a Herbology professor, given his love and talent for that subject. Luna could be teaching something really unique, like the study of magical creatures that are often overlooked or misunderstood.
One possible antagonist could be a jealous professor who feels threatened by Harry's popularity among students. This professor might try to undermine Harry's teaching methods and reputation. Another could be a student who has fallen under the influence of a dark magic book in the college library and starts causing trouble. Or it could be an old enemy from Harry's past who has disguised themselves and managed to get a job at the college to seek revenge on Harry.
It could be Professor Snape. Despite his often - cold exterior towards Harry, in a fanfiction scenario, there could be a moment of unexpected connection. Maybe Harry is injured in a potions accident and Snape, in a rare moment of compassion, has Harry sit in his lap while he administers a healing potion.
In the fanfic, Harry could be a professor of Muggle Studies. He'd introduce the wizarding students to the amazing and diverse Muggle world. He could talk about Muggle technology, like how cars work or what the Internet is. His own experiences growing up in the Muggle world would give him a unique perspective to teach this subject.
Hermione would surely be there. She might be a fellow professor, teaching a subject like Transfiguration or Ancient Runes. She could be Harry's confidante and help him with academic matters at Hogwarts. Also, Ron could make an appearance, perhaps as a visiting lecturer from time to time, sharing his knowledge of wizarding chess and other aspects of wizard culture.
One possible plotline could be that Professor Riddle, perhaps a relative of the infamous Voldemort (Tom Riddle), initially has a strained relationship with Harry. He might be suspicious of Harry due to his family connection to the Potters. However, as the story progresses, they could discover they have more in common than they thought, like a shared interest in some arcane magic. And they might end up working together to solve a mystery within Hogwarts that threatens the entire wizarding world.
One possibility could be that Harry has faced some extreme danger or a great loss in the wizarding world. Maybe he lost a close friend in a battle, and Snape, despite their past differences, offers him a moment of comfort. Snape, in this scenario, might be showing a side of himself that Harry has never seen before, a more empathetic side.
Hermione would most likely be one of his top allies. She's smart and well - read in wizarding law, so she could help Harry build his case. Ron would also be there for moral support and to offer his own unique perspective on things.