He could be more rugged and less refined. Since ancient times were probably harsher, Harry would have to be tougher. He might be more in tune with nature and its magic, like being able to communicate with forest spirits or something.
Harry in an ancient times fanfiction would be a very different character. He'd be more self - reliant as there may not be as many institutions to support him. His Gryffindor courage would be tested in new ways. For example, when facing ancient magical beasts that are much larger and more fearsome than those in his own time. His loyalty to his new friends, who might come from diverse backgrounds like nomadic magic - users or those from secluded mountain wizard communities, would be crucial. And his ability to think on his feet and use magic in creative ways would be even more important, as the magic in ancient times may not be as well - documented and he'd have to figure things out on his own a lot more.
If Harry Potter was born in ancient times, he might be a great wizard in a more primitive magical society. He could learn magic from ancient spells and traditions. Maybe he would be seen as a prophet or a powerful sorcerer, using his powers to protect his tribe or village from dark forces that were different from the ones in the modern wizarding world, like ancient spirits or strange magical beasts.
Well, it could be really exciting. Maybe Harry and his friends would discover ancient Egyptian magic that's different from what they know at Hogwarts. For example, spells related to the gods and goddesses of Egypt could play a big role. They might have to deal with Egyptian magical creatures too, like the Sphinx, but in a whole new setting that combines the world of Harry Potter with the ancient Egyptian landscape.
He'd be a really cool mix. He'd probably be more confident and tech - savvy. Since Tony Stark is his dad, he'd have that Stark charm and arrogance a bit. He'd still be brave like in the original, but he'd also be more innovative in his use of magic, maybe combining it with some technology.
In this fanfiction concept, the story could unfold in many ways. Maybe Harry would be a powerful wizard in an ancient magical society, facing different dark forces. For example, instead of Voldemort, he might battle an ancient evil sorcerer who wants to control all magic. The magic in ancient times could be more raw and less regulated, so Harry would have to adapt quickly.
In such a fanfiction, Harry might become a very different wizard. The Ancient One could teach him unique forms of magic, perhaps more focused on the spiritual and esoteric aspects. He would likely grow up with a very different world view compared to being raised by the Dursleys. He might be more in tune with the ancient magic and have a greater understanding of the balance of the magical world from a young age.
He might study in a Chinese wizarding school modeled after ancient academies. He could learn Chinese magic arts like using calligraphy to cast spells or using the power of elements in a very different way from Western magic. And his friends would be from different Chinese clans with their own unique magical heritages.
Emotionally, she could be more aloof or mysterious. Growing up with vampires, she may have learned to keep her emotions in check. However, she might also have a fierce loyalty to those she considers family, which in this case would be the vampires who raised her. In her relationships at Hogwarts, she might have a hard time making friends at first because of her unusual background.
It would probably be a very strange and interesting mix. Harry might use his magic to interact with Pikachu in unique ways. For example, he could try to teach Pikachu some spells or use magic to enhance Pikachu's electric attacks. It would also be fun to see how the wizarding world and the Pokémon world would collide, like if Hogwarts had Pokémon classes.
In this kind of fanfiction, Harry would have to learn to control his firebending, just like he learned magic. The Hogwarts setting could be adapted to include training areas for firebending. His friends might also get involved, like Hermione trying to figure out the scientific aspects of firebending. And the villains, such as Voldemort, would face a very different kind of threat from Harry's firebending abilities. It would be a completely new take on the 'Harry Potter' story, with elements of 'Avatar: The Last Airbender' added in a very creative way.
It could be a wild ride. Loki would bring his own brand of chaos to the wizarding world. He might start by using his illusions to mess with the Hogwarts students during exams, making them see their worst fears instead of the exam papers. His relationship with the professors would be complex. Some, like Snape, might be immediately suspicious of him, while others like McGonagall might try to keep him in line. And his interactions with the trio - Harry, Ron and Hermione - would be full of surprises. He could either be an ally or a foe, depending on his mood and his goals at the time.