It would be really wild. Harry Potter in the role of Dr Fate would bring a whole new dynamic. Harry's magical skills from the wizarding world combined with Dr Fate's powers and responsibilities. He might use his wand in new ways while wearing Dr Fate's helmet. Maybe he'd use his knowledge of Hogwarts magic to fight enemies in a different, more cosmic way like Dr Fate does.
The main difference is the alteration of fates. In the original series, certain events are set in stone, but in the fanfiction, characters' fates can be changed. For example, in the original, Sirius Black dies, but in the fanfiction, he might survive. Also, the relationships between characters can be different. Harry might not have the same enmity with Snape in the fanfiction.
One unique feature is the crossover of two distinct universes. You get to see the magic of Harry Potter, like spells and magical creatures, combined with the servant system and the Holy Grail War concept from Fate Grand Order. For example, a Harry Potter character might summon a Fate Grand Order servant. Another feature is the new character dynamics. Characters from both worlds that would never meet in their original settings now interact, creating fresh and unexpected relationships.
Well, it's rather inappropriate. The Harry Potter universe is about magic, friendship, and heroism. Jack the Ripper represents a completely different and very dark aspect of human history. Mixing the two seems like a disrespect to the original themes of the Harry Potter series and also a rather morbid idea in general.
Some interesting ideas include changing the way magic is taught at Hogwarts. In the fanfiction, perhaps they could introduce new spells or magical theories that were not in the original books. Also, the fates of the Weasley family members could be different. Maybe George could have found a way to bring Fred back to life in this alternate version. And, of course, the fate of Voldemort could be changed, like he could have been redeemed instead of being the ultimate villain.
One possible reason could be extreme disillusionment with the wizarding society in Britain. Maybe he faced so much political intrigue, discrimination, or ungratefulness from the people he had saved that he just couldn't take it anymore. For example, if the Ministry of Magic continued to be corrupt and turn a blind eye to dark magic activities, it might push Harry to abandon the place.
It makes him seem more self - centered at first glance. Traditionally, Harry was seen as the savior of Britain, so leaving it to its fate goes against that heroic image. But on a deeper level, it could also show his growth into a more complex character who has his own needs and boundaries.
Well, it could be really interesting. He might be confused at first, seeing the different world of Fate Stay Night with its own set of rules about magic, heroes and the Holy Grail War. Maybe he'd compare the magic in his world to what he reads in the fanfiction. He could also get some new ideas about friendship and loyalty from the characters in the fanfiction.
Well, it's possible that such a fanfiction exists. However, the world of fanfiction is vast. Harry Potter and Dr Fate come from different fictional universes, so it would be an interesting crossover. You may have to dig deep in the fanfiction communities. Check out some of the more niche Harry Potter or Dr Fate fanfiction groups on social media platforms. They might be able to point you in the right direction if such a story exists.
In fanfics, the red string of fate can be a creative device. For Harry Potter, it could be a magical string that only certain magical beings can see. It might show a connection between a wizard and a magical creature. In Twilight, it could be something that the Volturi are aware of and use to manipulate relationships. For instance, they could try to sever the red string between a vampire and a human to stop a potential powerful union.