Perhaps there are challenges from their friends and the wizarding community. Some might be shocked or disapproving of their union. This could lead to them having to defend their relationship and face various social pressures. Maybe they have to work together to prove that their marriage can work despite the unorthodox start.
Hermione would likely be a key friend. She might be initially very confused and try to analyze the situation rationally. She could be worried about how this will affect Harry and his future, and might try to find a way to reverse the situation if it seems harmful to Harry.
Well, it could be a story where Harry and Fleur are part of a secret mission together. They had to stay the night in a hidden place for safety. When Harry wakes up with Fleur, they might start discussing their next moves in a very friendly and perhaps a bit flirty way. They could exchange stories about their experiences at Hogwarts and Beauxbatons respectively, and then realize they have more in common than they thought.
If Harry wakes up with Fleur, it could be a bit of a shock for both of them. But then, they might find that they are drawn to each other's personalities. Fleur's elegance and confidence might attract Harry, and Harry's courage and kindness could win Fleur over. Their relationship could develop as they face challenges together. For example, they might have to fight off some dark wizards who are after a powerful magical artifact. Through these experiences, their bond could strengthen into a deep and loving relationship.
He could be married to Luna Lovegood. Their relationship in the original series was more of a friendship, but in fanfiction, it could be that they got married. Maybe they were on an adventure together, something went wrong magically, and they woke up married. Luna's unique personality would bring a lot of interesting elements to the story as they figure out their new relationship.
One popular 'Harry wakes up married' fanfiction might involve him waking up married to Hermione. In this scenario, they could have been under the influence of a magical spell that made them get married without realizing it. Then they have to deal with the consequences, like telling their friends and trying to figure out if they actually have feelings for each other.
Well, perhaps they could start the day with a friendly chat over breakfast. Harry might share some of his wizarding world stories with Gabrielle, and she could be really fascinated by them.
New and upcoming writers could also write a great one. They might bring a fresh perspective to the idea. Maybe a young writer who has a vivid imagination and is a big fan of both Harry and Gabrielle as characters. They could come up with unique scenarios and interactions between the two that we haven't seen before.
Obviously, Harry would be the main character, just in a female form. Hermione would also be a very important character. She could be the one to help Harry understand and navigate the new experiences of being a girl in the wizarding world. Ron might also be there, and his reactions to Harry's transformation could add some interesting dynamics to the story.
Well, perhaps a plot where Harry wakes up as a girl and discovers new magical abilities that are more commonly associated with female witches. She might then have to learn how to control and use these abilities while also coming to terms with her changed physical form. It could also involve a romantic sub - plot where characters who previously saw Harry as a boy now have different feelings towards her as a girl.