Voldemort or his followers could also be relevant in some stories. Maybe Harry is leaving because he fears a resurgence of Voldemort's forces and wants to find a way to defeat them from afar. Or perhaps some of Voldemort's old followers are still after him, and his leaving is a way to draw them away from the innocent people in Britain.
One common theme is self - discovery. When fem Harry leaves Britain, she often has to figure out who she is outside of the expectations and restrictions of the British wizarding world. For example, in many stories, she realizes she has different magical abilities or interests that were suppressed in Britain.
Hermione could accompany him. She's always been by his side and would likely follow him out of loyalty and a thirst for new knowledge. Together, they could explore new magical theories in different parts of the world. Another possibility is Hagrid. He has a soft spot for Harry and might want to protect him on his journey. He could introduce Harry to different magical creatures in other countries.
There's a fanfic called 'Farewell, Britain'. Here, fem Harry leaves Britain because she feels that she can no longer tolerate the false accusations and the dangerous situations she's constantly in. She heads to America where she discovers a whole new world of magic. It's full of adventure as she meets new friends and foes alike. It also explores her growth as a person outside the familiar British magical world.
Hermione Granger is often a key character. Her intelligence and knowledge of magic could help plan the escape. For example, she might find a way to bypass the magical barriers around Britain. Ron Weasley could also be involved, providing his loyalty and courage. He might help Harry fight off any threats during the escape attempt. Additionally, Dumbledore, even if it's in spirit or through some pre - arranged plan, could play a role in guiding Harry's escape.
Hermione would probably be one of the common characters. She could be helping Harry in his research, using her vast knowledge to find solutions to difficult medical cases. Maybe she'd be working on developing new potions for healing.
One possible plotline could be Harry leaving Britain to explore the magical communities in other countries like France or America. He might discover new spells or magical creatures there.
There's 'The Journey of Fem Harry Away from Britain'. In it, Fem Harry decides to leave Britain as she believes she can't grow and fight Voldemort effectively in the environment she's in. She may encounter new allies and enemies on her journey away from Britain. Maybe she meets some foreign wizards who have different ways of magic that could help her in her fight against Voldemort. And then there's 'Fem Harry's Departure'. This fanfic could explore how her leaving Britain is a strategic move to draw Voldemort out of his comfort zone and into a new battlefield.
The theme of breaking free from expectations is quite common. In Magical Britain, Harry has so many expectations placed on him because of his status as 'The Boy Who Lived'. When he leaves, he can be his own person and not be defined by those labels. Also, the exploration of different magical cultures is a big theme. He gets to see how magic is practiced in other parts of the world, which is really fascinating.
In 'harry potter reincarnated fanfiction', Voldemort can be a recurring character. If Harry is reincarnated, Voldemort might sense a strange new threat or an opportunity. Snape could also be there. His complex relationship with Harry could be re - explored in these new incarnations. And of course, Luna Lovegood might make an appearance, with her unique perspective adding an interesting element to the story.
Obviously, Harry Potter himself is a common character. His friends like Hermione Granger and Ron Weasley also often show up. They might accompany Harry on his journey or play important roles in the events that occur during his travels.