Harry Potter would have to adapt to the culture in Westeros. The social norms, the way of life, and the values are different from what he's used to. He might have to learn how to fight with swords and shields as well, since that's a common form of combat there. He'd also need to be careful about who he trusts, as the political climate in Westeros is full of deception.
He would probably start by trying to understand the magic in Westeros. Since it's different from what he knows, he'd need to be cautious. Maybe he'd find some similarities between the two magics and build on that.
If Harry Potter ends up in Westeros in a fanfic, he could bring some new ideas about magic. The people of Westeros are used to their own kind of sorcery. Harry, with his knowledge of spells like Expelliarmus and Wingardium Leviosa, might either be seen as a great asset or a threat. He could also make friends with some of the characters. For example, he might bond with Arya Stark over their shared skills in combat and stealth, albeit in different ways. He could also potentially teach some of the younglings in Westeros about his type of magic, which could change the balance of power in the land.
He'd likely use his ninja skills first. His ability to quickly assess situations would help him understand the new environment.
Some characters in Westeros might be very suspicious of Harry. His strange clothes and the way he does magic would make them think he's some sort of dark sorcerer. Others, like the more open - minded ones, might be curious and want to learn from him. For example, Tyrion Lannister might see Harry as an interesting oddity and try to figure out how his magic works.
He'd adapt by using his ninja training. His ability to quickly learn and adapt to new situations would help him understand the city layout, the way people communicate, and the different social norms.
Naruto would likely be very confused at first. But his determined nature would help him adapt. He'd start by learning basic things like how to use money. Since he's used to a barter system in his world, this would be a new concept. He might also pick up on the local language quickly, as he's always been a fast learner.
He might interact with Jon Snow. They both have a sense of honor and duty, so they could become friends or allies. Maybe they would fight together against the White Walkers.
Harry Potter would adapt to Yokai Academy in a fanfic by relying on his adaptability and his ability to make friends. He'd probably be a bit of an outsider at first, but as he gets to know the yokai, he'd start to understand their ways. He'd need to learn the social norms of the yokai, like how they show respect or disrespect. His magic skills would also evolve. He might discover new uses for his spells when faced with yokai - specific problems. For example, if there are yokai that can only be defeated by a certain type of non - lethal magic, Harry would have to figure out how to modify his spells to meet that need. And he'd have to deal with any potential prejudice from either the yokai or his own wizarding self - consciousness about being in a new and strange place.
Naruto would probably find the social hierarchy in Westeros quite strange at first. But his friendly and adaptable nature would help. He might start at the bottom, but his skills would quickly earn him respect. He could become a sort of outsider hero, not fully bound by the strict rules of the hierarchy.
If Harry Potter were in Westeros, he could bring some of his own unique magic skills. For example, his ability to fight dementors could be useful against some of the dark forces in Westeros. However, he'd also face challenges. The society in Westeros is based on a feudal system, and he'd need to find his place in it. Maybe he'd join one of the houses and use his magic to help them in battles or in solving internal problems.
The fem Harry Potter could also change the power balance. If she aligns herself with a particular house, that house would gain an edge. Her knowledge of magic could be used to uncover secrets in Westeros, like hidden passages in castles or ancient prophecies that were previously unknown. This new information would disrupt the existing plans of the different factions vying for the Iron Throne and other power positions.