In some fanfictions, there might be a plot where Bellatrix and Harry are forced to team up against a greater evil. For example, a new dark wizard emerges who is more powerful than Voldemort, and they have to put aside their differences. Bellatrix, with her knowledge of the dark arts, and Harry, with his courage and Gryffindor spirit, make an unlikely but effective duo.
Another plot could be a time - travel scenario in the fanfiction. Harry somehow travels back in time and meets a younger Bellatrix before she fully embraced the dark side. He tries to influence her to make different choices, which could have a huge impact on the entire wizarding world's future.
Well, a possible plot is that Harry discovers his true parentage in a very dramatic way. He could be in the middle of a battle or a difficult situation at Hogwarts and suddenly realize that Snape and Bellatrix are his parents. This would completely change his perception of himself and his place in the wizarding world. He might then have to deal with the consequences of this revelation, such as how the Order of the Phoenix and the Death Eaters view him.
One interesting fanfic could be about Bellatrix's backstory and how it might have intersected with Harry Potter in ways not shown in the original books. For example, a fanfic could explore a scenario where Bellatrix had a chance encounter with Harry as a child before she fully committed to Voldemort's cause.
Some 'Harry Potter Bellatrix Black' fanfics focus on her relationship with other characters in the series. There are fanfics that explore her bond with Voldemort in a more complex way than in the original books. It could show her as not just a blindly loyal follower, but having her own motives and desires within that relationship. Also, fanfics might show her interactions with the Black family members in a new light, perhaps revealing secrets or hidden tensions that were not fully explored in the official story.
There are fanfictions that explore Bellatrix's past and her relationship with the Black family in the context of Harry Potter. For example, a story might delve into her time at Hogwarts, her early indoctrination into the Dark Arts, and how that influenced her actions in the main series. This could provide a deeper understanding of her character and how she became so fanatically devoted to Voldemort. It might also show how her actions affected the wider wizarding world in ways that weren't fully explored in the original books.
Some fanfictions might focus on Bellatrix's relationship with Voldemort in more depth. How her loyalty to him was formed and what she was really thinking during their interactions. For example, in some fanfictions, they might explore if there was a more complex emotional bond between them than just master - servant.
One possible plot could be that Harry's appearance causes confusion among the Death Eaters. They might initially mistake her for Bellatrix and this could lead to some comical or tense situations. For example, she could be captured by them thinking she's Bellatrix and then have to use her wits to escape.
One idea could be that Harry discovers his true parentage and has to struggle with his identity. He might be torn between the side of good that he has known all his life and the dark legacy of Bellatrix. Another plot could involve him facing discrimination from both the wizarding world that hates Bellatrix and the Death Eaters who might see him as a tool or a threat. For example, he could try to use his knowledge of Bellatrix's magic, which might be more complex and dark - tinged, to fight against Voldemort in a different way than in the original story.
A fanfiction that focuses on a parallel universe where Bellatrix Black was not a Death Eater. In this story, she could be a mentor to Harry Potter, teaching him some unique magic skills that she has, and they could form an unlikely alliance against other dark forces. It would be interesting to see how their personalities would interact in such a different scenario.
One interesting plot could be the discovery of a hidden power within the Black Coven that Harry Potter has to learn to control in order to defeat a new dark force. It might involve ancient spells and secrets passed down through the generations of the coven.
Another possible plot could involve a group of characters who are on a quest to find the origin of the black belt magic. Along the way, they encounter various obstacles and mysteries. They might have to decipher ancient texts, face dangerous creatures, and deal with other wizards who are also interested in the power of the black belt. This journey could lead them to discover secrets about the founders of Hogwarts and how this unique magic was once a part of the school's teachings but was later lost.