She might face a lot of challenges. For example, she'd have to adapt to the magical world of Hogwarts which is very different from her original world. The classes like Potions and Transfiguration would be new to her. And she might make new friends or enemies among the Hogwarts students.
If Fem Naruto goes to Hogwarts in fanfiction, it could be really interesting. She'd likely have a hard time adjusting at first. The whole concept of magic wands and spells would be new to her. However, her determination would help her catch up quickly. I can imagine her getting into some trouble because of her impulsive nature, but also using her ninja stealth to get out of tight situations. And she'd definitely bring a new dynamic to Quidditch with her athletic abilities.
If Percy Jackson goes to protect Hogwarts in fanfiction, it'd be an amazing crossover. Percy is used to facing all kinds of monsters, and at Hogwarts, he'd have to adapt to magic. He might form an alliance with some of the Hogwarts students. His speed and combat skills could help in protecting the school from any invaders, whether they be Death Eaters or other dark creatures.
In the 'Percy goes to Hogwarts alone fanfiction', it's possible that Percy will discover new aspects of himself. Since he's alone, he has to rely solely on his own wits and skills. He could stumble upon some hidden secrets of Hogwarts that others haven't found. Also, he may have some unique encounters with the Hogwarts professors who take notice of his solitary situation and offer him special guidance or tasks.
In a fanfic where Percy goes to Hogwarts alone, he could form some interesting friendships. He might befriend Neville, who is also a bit of an underdog. Percy could teach Neville some of his own courage -building techniques. And he would surely be a star in the Quidditch field with his athletic abilities, even if he has to learn the rules first.
Well, she'd probably terrify most of the students at Hogwarts. Wednesday has her own unique and rather dark style. She might not be too impressed with the magical world's rules and hierarchies. Maybe she'd befriend thestrals since they are associated with death, which she has an odd fascination with.
If godlike Naruto goes to Hogwarts in fanfiction, it would be a total chaos in a good way. Naruto is known for his determination and ability to make friends. He would quickly befriend many students. His chakra and ninjutsu would be a new and strange concept to the wizards. He could even use his Shadow Clone Jutsu to attend multiple classes at once, which would amaze the professors. Also, his experience in battles would make him a great asset in protecting Hogwarts from any potential threats.
Well, he might use his ghost powers to play some really interesting pranks at Hogwarts. Maybe he could turn invisible and sneak into the restricted section of the library without getting caught by Filch or Mrs. Norris. He could also use his flight ability to play a wild game of Quidditch, flying rings around the players on broomsticks.
He could introduce some new combat styles to the Dueling Club. His experience in fighting monsters as a demigod would give him an edge. He might be a bit of an enigma to the Hogwarts professors too. They would be intrigued by his different kind of magic. And with his being betrayed, he could be a bit guarded at first, but gradually open up as he realizes that not everyone at Hogwarts is like those who betrayed him. He could also discover some hidden chambers or secrets in Hogwarts that have a connection to his demigod world, like a hidden place that has a link to the Greek gods.
In this fanfiction scenario, Percy's adaptation to Hogwarts would be a complex process. He'd first have to deal with the cultural shock of a new magical world. The Hogwarts houses would be different from the cabins at Camp Half - Blood. He'd need to figure out which house he belongs in. His skills with a sword might not be as useful as in his own world, but he could learn to use magic to enhance his combat abilities. Also, he'd have to make new friends and enemies, and learn how to navigate the social politics of Hogwarts while still holding on to his own identity as a demigod.
One possibility is that Harry's late arrival at Hogwarts could change the dynamics of the relationships he forms. For instance, instead of being in the same boat as the first - years from the start, he might end up befriending some older students who take him under their wing. Also, his late start could mean that he discovers parts of Hogwarts that others haven't yet, like secret passages or rooms that are only accessible to those who arrive late or are in a certain situation.