A possible plotline is that Bellatrix is actually an undercover agent for the Order of the Phoenix all along, and her relationship with Harry is part of her cover. They get married as part of a larger plan to infiltrate the Death Eaters more deeply. As they live together, they start to truly care for each other. Another plotline could be that a powerful magical artifact forces them to marry. They initially hate each other but as they are forced to co - exist, they discover hidden sides of each other. Harry might see the broken and conflicted person inside Bellatrix, and Bellatrix might see the true hero in Harry. This could lead to a very complex and emotional story of love and redemption.
One possible plotline could be that Bellatrix is somehow brainwashed or redeemed early on. Harry, seeing the potential for good in her, tries to help her further. Over time, they develop feelings for each other and end up getting married. Another could be a time - travel scenario where Harry goes back in time and changes Bellatrix's path before she becomes a full - fledged Death Eater, leading to their relationship and marriage.
Yes, there are some fanfictions out there with this rather strange pairing. However, it goes completely against the canon as Harry is a hero and Bellatrix is a Death Eater. But in the world of fanfiction, writers like to explore different and often unexpected relationships for the sake of creativity and exploring different character dynamics.
A possible plotline could start with Bellatrix having a strange fascination with Harry from the start. She manages to get him in her clutches and treats him like a pet. Harry, on the other hand, uses his wits and the limited magic he can access in this state to outsmart Bellatrix. There could be a lot of psychological battles between them, with Harry trying to understand Bellatrix's twisted mind while she tries to break his spirit. And all this could be set against the backdrop of the ongoing war between the good and the evil in the wizarding world.
One possible plotline could be that Bellatrix captures Harry during one of his adventures and decides to keep him as a pet for her own amusement. She might use dark magic to bind him and make him obey her commands. Another could be that in an alternate reality, Harry is somehow magically enslaved to Bellatrix from the start, and the story follows his attempts to break free from her control while she uses him for various dark purposes, like spying on the Order of the Phoenix.
Yes, there are some out there. Some fanfictions might explore a very different and often dark or alternate universe where such a relationship occurs. However, it's important to note that this goes against the general nature of the characters in the original series, as Bellatrix is a Death Eater and Harry is her enemy.
One main theme could be redemption. Maybe the fanfiction shows Bellatrix being redeemed through her relationship with Harry. Another theme might be the power of love to change people. Since they are on opposite sides in the original story, their marriage in fanfiction could be about how love overcomes their differences.
Well, a frequent theme could be the clash of two different worlds. Harry represents the side of light and Bellatrix the side of darkness. So, in these fanfictions, there could be a theme of how these two opposing forces try to co - exist. Also, there might be a theme of forbidden love, since in the original lore they are on opposite sides of a great conflict. It's like exploring what would happen if the boundaries between good and evil were blurred in terms of relationships.
In some fanfictions, Bellatrix might save Harry because she is magically bound to him in some way. Maybe a spell backfired and now she has to protect him. Or perhaps she has a secret love for Sirius Black (Harry's godfather) and in order to honor his memory, she saves Harry. There could also be a plotline where Bellatrix is tired of Voldemort's tyranny and sees Harry as the one who can overthrow him, so she saves him for the greater good of the wizarding community.
One possible plotline could be Bellatrix having to protect the members of her harem within the dangerous wizarding world. Maybe they face threats from Voldemort's other followers who don't approve of her 'harem'.
In a more complex scenario, Bellatrix could be trying to use a dark magic ritual that would cause great harm to the wizarding world. Harry discovers her plan and has to engage her in a magical struggle. In the process, he manages to turn her own dark magic against her, which results in her death. This would show Harry's ingenuity and his ability to use the enemy's own weapons against them.