One reason could be to escape the trauma of the war. They've been through so much in England, and leaving gives them a chance to heal in a new environment.
Maybe they want to explore different magical cultures. England has its own set of magical traditions, but there are so many other places with unique magic out there. So they leave to learn more. For example, in some fanfics, they leave to study ancient magic in Egypt or India which is very different from what they know in England.
One reason could be to escape the danger and dark forces that still lurk in England even after the main battle. They might feel that leaving is the only way to start anew and be truly safe. Maybe they want to explore other magical cultures around the world and learn more about magic that is different from what they've known in England.
Maybe he's tired of the spotlight in England. In some fanfictions, he could be seeking a new start away from the prying eyes and the constant media attention that comes with being in England.
One reason could be to explore the wizarding world outside of England. There are many magical places they might be interested in, like the wizarding communities in France or America. They could be on a mission to learn more about different magical cultures and bring back new knowledge to England.
One possibility is America. The American wizarding world is quite different from England's. There are different magical creatures, different magical laws, and a whole new set of challenges and opportunities. They could end up in New York or Salem, places with significant magical presences in the American wizarding community.
One possible reason could be for adventure. Hermione is a very curious character. Maybe in the fanfiction, she has heard of some mysterious magical place outside England that she just has to explore. For example, there could be a hidden library full of ancient and powerful spells that is only accessible in a far - off land.
One interesting fanfic could be 'A New Start'. In it, Harry and Hermione leave England due to the constant reminders of the war and a desire for a fresh start. They travel to a small, idyllic village in France where they begin to explore new forms of magic and build a life away from the prying eyes of the British wizarding world.
There's a fanfic titled 'Beyond England's Borders' which details their journey of leaving England. It delves into how they deal with the challenges of leaving their home country, like leaving behind friends and family, while also facing new magical threats and adventures. In this story, they head to France first and thenventure further into Eastern Europe, exploring different magical cultures along the way.
One reason could be ideological differences. Maybe she discovers that the Order's methods don't align with her own sense of justice. For example, if the Order starts to use unethical magic in their fight against the Dark forces, Hermione, with her strong moral compass, would not stand for it.
One reason could be to find peace. After all the chaos and war in England, they might just want to get away from it all and start fresh somewhere else.
Well, perhaps in the fanfiction they leave because of a prophecy. A prophecy might state that their presence near Hermione would bring great danger to her or to the wizarding world as a whole. So, they sacrifice their friendship and leave. Also, it could be due to some dark magic influence. They are forced by a powerful dark magic spell to stay away from Hermione, not having control over their actions.