It could be an old, kind - hearted Muggle woman who has seen a lot in her life. She might have a small office filled with plants and cozy furniture. She takes Harry in as a patient because she senses his deep - seated sadness. Even though she doesn't know about the wizarding world, she has a natural intuition for helping people.
One possible plot could be Harry dealing with the trauma of living with the Dursleys. He might be constantly bullied by Dudley and neglected by the adults. In therapy, he could start to open up about his feelings of isolation and fear. Maybe he discovers his magic during these therapy sessions as a way to cope, like making small objects move when he gets extremely emotional. This would be a new take on his pre - Hogwarts life, exploring his psychological state rather than just the physical abuse he endures.
He might meet the house - elves that have been taking care of Potter Manor for generations. They could show him around the manor and tell him stories about his family.
Maybe Harry Potter could use his magic to solve some of Smallville's strange problems. For example, when there are meteor - related disasters in Smallville, Harry could use spells to protect the town. He might also meet Clark Kent and they could learn from each other. Harry could teach Clark about magic, and Clark could show Harry how to be a hero without relying solely on magic.
Obviously, Harry Potter himself. There could also be some Beautox - natives, like a wizard or witch who is an expert in Beautox magic. Maybe Hermione would somehow find a way to follow Harry and she'd be there too, trying to figure out the new magic system.
Well, it might be about Harry Potter entering the world of Beautox. Maybe he goes there by accident, like through a magical portal. And then he has to deal with all the strange things there, like different kinds of beauty potions that are way more extreme than what he's used to in the wizarding world.
Well, he might use his magic to defeat the dragons in Skyrim. Maybe he'd introduce some new spells to the mages there. It could be really interesting to see how his Hogwarts-trained skills fare against the challenges of Skyrim.
One possible plot could be Harry going to America to study at a new wizarding school. He might encounter new magical creatures and spells unique to the American wizarding world. He could also make new friends and enemies there.
He might be amazed by the grandeur of Asgard. Its golden palaces and powerful magic could both intrigue and intimidate him. Maybe he'd meet Thor and they'd exchange stories about their different kinds of magic and heroic deeds.
In this fanfic, perhaps Harry might discover hidden secrets of Potter Manor. He could find old family heirlooms or secret rooms that were unknown to him before.