The fanfic could start with Harry as a young child being raised by Bellatrix in a hidden lair. Bellatrix trains him to be a powerful dark wizard. As he grows, he is sent on missions for the Death Eaters. But during one mission, he meets a young witch or wizard who shows him a different side of magic, a more positive and inclusive side. This encounter plants a seed of doubt in his mind. As the story progresses, he has to deal with the conflict between his loyalty to Bellatrix and this new - found idea of a better way of using magic.
One possible plot could be Harry growing up believing he is on the right side by following Bellatrix and the Death Eaters. But then he discovers some secrets about his real parents and starts to question everything he's been taught. This leads to an internal struggle as he tries to decide whether to stay with Bellatrix or break away and find his true identity.
One possible plot twist could be that Harry, under Bellatrix's influence, becomes a much darker and more ruthless wizard. Bellatrix might train him in the Dark Arts, and he could end up being a sort of anti - hero. He might have a completely different view of the wizarding world and be at odds with his former friends from Hogwarts.
If Harry Potter was raised by Bellatrix, he would likely grow up in a very dark and twisted environment. Bellatrix is a Death Eater, so Harry would be exposed to the dark arts from a young age. His values and beliefs would be very different from the ones he has in the original story. He might not have the same sense of right and wrong, and could be more inclined towards the use of dark magic.
Well, a cool plot for a 'Harry Potter and Bellatrix Fanfic' might be that Bellatrix, in a moment of confusion during a battle, uses a spell that transports her and Harry to a different time period. There, they have to rely on each other to survive and in the process, Bellatrix starts to question her loyalty to Voldemort. Also, a plot where Bellatrix discovers that Harry has a hidden power that could be used to bring back someone she lost, and she bargains with him for it could be interesting.
One possibility is that Harry grows up in a more refined and magical environment. The Delacour family might introduce him to different aspects of French magic. He could be trained in unique spells and magical traditions. Also, he might have a different relationship with the magical community, perhaps being more involved with international magical relations from an early age.
Well, Flamel is an extremely old and wise wizard. If he raised Harry, Harry would be exposed to a different kind of magical culture. He could learn about the history of magic in a more in - depth way, not just from Hogwarts but from Flamel's long - lived experiences. Also, Flamel might have different ways of training Harry in magic, which could make Harry a very unique wizard compared to the original story.
One possible plot could be that the soldiers instill in Harry a sense of discipline and combat skills from a young age. He might grow up with a military - style routine, which would make his Hogwarts experience very different. For example, he could be more organized in his studies and dueling, approaching them like military strategies.
Well, it might be that the Bones family discovers baby Harry after the death of his parents. They could raise him with a strong sense of justice, which is characteristic of the Bones family in the Harry Potter universe. Harry might grow up learning different magic skills from the Bones family traditions, and perhaps have a different perspective on the wizarding world compared to the original story.
Harry would likely learn dark magic. Bellatrix is a master of the dark arts, so she would teach Harry curses and hexes that are not typically taught at Hogwarts. He might learn how to use the Cruciatus Curse effectively, for example.
Another plot twist could be that Bellatrix realizes she has created a powerful adversary in Harry. As she raises him to be Lord Black, she instills in him a sense of power and ambition. But Harry uses that power not for the dark purposes she intended. Instead, he decides to reform the Black family traditions and bring a new era of inclusiveness to the wizarding world.
One idea could be exploring Bellatrix's backstory before she became a Death Eater. Maybe she had a complex relationship with her family that led her down the dark path. Another could be a story where she has a change of heart, perhaps due to an unexpected encounter with a character like Harry Potter. For example, she could see some of her own past self in Harry and start to question her loyalty to Voldemort.