If Hogwarts moves to a crossover with the DC universe, Superman could become a sort of ally or even a mentor to some of the Hogwarts students. But on the Hogwarts side, Ron could be the one to break the ice with Superman. Ron's down - to - earth nature might make it easier for him to communicate with someone as powerful as Superman, and together they could face some big threats in this crossover fanfiction.
Harry Potter himself could still be a main character. He would be the one to lead the Hogwarts students in this new and strange crossover world. Maybe he'd make friends with characters from the other universe, like Frodo if it was a Middle - earth crossover. Harry's experience with fighting dark forces would be really useful.
Hermione would definitely be a key character. Her intelligence and knowledge of magic would help everyone understand the new rules and magic in the crossover world. In a crossover with the Star Wars universe, for example, she might be the one to figure out how the Force and magic could interact.
One possibility is that Hogwarts moves to a crossover with the world of Narnia. The students would find themselves in a land full of talking animals and magical beings. They might have to help the Narnians in their fight against the White Witch. It would be a great opportunity for the Hogwarts students to show their courage and magic skills in a different setting.
Obviously Naruto himself would be a main character. He could be joined by Sasuke. In a crossover with 'One Piece', Luffy could also be a main character in the fanfiction, as he is the captain in 'One Piece' and would bring his own unique charm and abilities.
Obviously Percy would be one of the main characters. And there could be a new friend he makes in the new place, let's say a girl named Lily who helps him explore the new town.
Obviously, Harry would be the main character. But he could meet new friends like an Aboriginal wizard who teaches him about the ancient magic of the land. There might also be a young Australian witch who becomes his love interest and helps him adapt to the Australian wizarding world.
A good crossover character could be Naruto. He and Ichigo share some similarities in their determination and their growth as characters. They could team up in the new dimension, with Naruto's ninja skills and Ichigo's sword - fighting abilities making for an interesting combination against the new threats they face.
Definitely Naruto himself. He's the main character of the Naruto series, so he has to be there. In a crossover with Attack on Titan, he could meet Eren. Naruto's determination and Eren's drive to protect his people could make for an interesting dynamic between them.
Perhaps some of the more mysterious characters from the series could take the lead. For example, Isabel Kabra. Her devious nature could add a whole new layer of intrigue to the crossover fanfiction. She could be working with or against the other characters in unexpected ways, creating a lot of tension and interesting plot twists.
A group of scientists who were involved in creating the Indoraptor in the first place could be main characters. They might have to face the consequences of their creation when it crosses over into another world or situation. They would be trying to either control it or destroy it.
If it's a crossover with the DC universe, Batman could be the main character. He would use his detective skills and arsenal of gadgets to face the Deathclaw. His dark and brooding nature would make for an interesting contrast against the brute force of the Deathclaw.
It could be four new students, each representing a different 'flavor'. Maybe a spicy - flavored character who is bold and adventurous, always getting into trouble. Then a sour - flavored one who is a bit of a skeptic and always questions things. A salty - flavored character could be the reliable and down - to - earth type, and a sweet - flavored character who is the heart of the group, always there to cheer everyone up.