One common theme is survival. Harry has to find ways to survive not only the general danger in a world ruled by Voldemort but also the abuse at home. For example, he might learn to hide his magic better to avoid his parents' wrath.
The theme of rebellion also often appears. Harry, instead of being a meek victim, may rebel against his parents and the oppressive regime of Voldemort. He could form secret groups or engage in small acts of defiance, which makes for a very exciting and engaging plot.
One common theme is Harry's struggle with self - worth. If his parents abused him, he would likely have a very low sense of self - value. Another theme could be his distrust of authority figures, since his parents, who are the first authority in a child's life, were cruel. Also, themes of isolation and a longing for a real family often appear.
One common theme is self - discovery. When Harry runs away, he's forced to figure out who he really is outside of the expectations placed on him at Hogwarts. Another theme is the search for a true family or a sense of belonging. Away from the Dursleys and the wizarding world that has been so unfair to him, he looks for people who will accept him for who he is.
Another theme is gender roles. It shows how a female in the position of the 'Boy Who Lived' challenges the traditional gender roles in the wizarding society. This can be seen in how she interacts with male and female characters, and how she's treated by others. In some fanfics, she has to fight against the preconceived notions of what a female can and can't do in the magical world.
Power is also a common theme. In these fanfictions, the WBWL character may have different powers or a different way of using magic compared to Harry. They might have to learn to control and use their power in a world that has certain expectations based on what Harry Potter could do. And family plays a role too. How the character's family, whether it's their birth family or the family they find along the way, affects their journey in this alternate scenario is often explored.
One common theme is identity. Since the main character is a female Harry in a world where things have changed due to Voldemort marking Neville instead, she has to figure out who she is in this new context. Another theme is friendship. How her relationships with characters like Ron and Hermione might be different. For example, in some fics, the female Harry might have a closer bond with Hermione as they can relate more as girls.
In 'Harry Potter Master of Death WBWL' fanfiction, themes like self - discovery are prevalent. Harry has to figure out what it means to be the Master of Death and how it ties in with his WBWL identity. Family also becomes an important theme. He might explore his family history in a new light, given his unique position. Additionally, the battle between good and evil is often reimagined. His power as the Master of Death can change the dynamics of the fight against Voldemort, and this is a theme that many fanfiction authors like to play around with.
Well, in a lot of these fanfictions, a common theme is the clash of cultures. Harry coming from what is seen as a 'good' Gryffindor - type background into Slytherin. There's also the theme of secrecy. Slytherin is often associated with secrecy, and Harry might have to keep certain things about himself hidden. And then there's the theme of transformation. Harry is transformed not only by the Sorting Hat's decision but also by the experiences and relationships he has within the Slytherin house.
One common theme is self - discovery. Harry realizes he has these unique powers and has to figure out how to use them. Another is the idea of being an outcast, as his wandless magic may not be fully understood by others. For example, some characters in the fanfiction might be suspicious or jealous of his abilities.
In Harry Potter abusive relationship fanfiction, a frequent theme is the misuse of knowledge or secrets. A character might use a secret they know about another to blackmail or control them. This is somewhat related to how in the original story, secrets play a big role. But in these fanfics, it's turned into a tool for abuse. Another theme can be the abuse of loyalty. A character may demand extreme loyalty from another and punish them severely if they think it's not given wholeheartedly.
The theme of isolation is also prominent. Being neglected by his parents, Harry is often on his own. His prodigy status sets him apart even more. But this also leads to his growth as he learns to break out of his isolation and form his own kind of family with his friends at Hogwarts. In these fanfics, we see how he copes with this isolation and uses his extraordinary abilities to find a place for himself in the wizarding world.