Perhaps in a fanfic, Bellatrix has a vision of a future where Harry is the key to saving the wizarding world from a new, unknown dark force. She then approaches Harry in a very un - Bellatrix - like way, trying to persuade him to trust her. Harry is very skeptical but as they explore the truth behind the vision together, they grow to respect each other and work towards the greater good.
A plot might involve Harry being captured by Bellatrix. Instead of harming him immediately, she is intrigued by his power. She tries to break his spirit but Harry resists. Over time, through their power struggles and intense conversations, a strange connection forms between them that changes their relationship in unexpected ways.
The plot could revolve around Bellatrix's memories in Azkaban. Since she was there for a long time, she might have had some extremely vivid and disturbing memories. A fanfiction could explore these memories and how they influenced her actions after she escaped. For example, she might have seen the faces of those she killed in her dreams while in Azkaban, and this could have made her more vengeful.
Well, in a 'Harry impregnates Bellatrix' fanfic, it might explore the chaos that would ensue in the wizarding world. Harry's friends would be horrified and confused. Bellatrix, being who she is, might have her own dark motives for allowing or even causing such a situation. It would be a very complex and disturbing story that would likely rewrite many established character traits and relationships in the 'Harry Potter' universe.
In a fanfiction, the plot could revolve around Bellatrix misusing the Cruciatus Curse and getting in trouble with Voldemort. She uses it on one of Voldemort's favored servants by mistake. Voldemort then has to decide whether to punish Bellatrix severely or let her off with a warning, while Bellatrix tries to plead her case and shift the blame onto others.
Maybe Harry is in a dire situation where he needs a powerful source of magic to defeat Voldemort, and Bellatrix's magic seems like a viable option.
If such a fanfic were to exist, perhaps it could involve Harry somehow using a new and powerful magic 'force' to subdue Bellatrix and then there could be a strange turn of events where they end up in a situation that seems like they are fuxking. But this is all very outlandish and not in line with the general tone of the original Harry Potter series.
Well, one possibility is that Harry would be raised in a very different magical environment. Bellatrix is a Death Eater, so he might be exposed to dark magic teachings from a young age. But perhaps, deep down, Bellatrix could have some strange maternal feelings towards Harry and protect him from the other more extreme Death Eaters. This could lead to a really complex internal struggle for Harry as he grows up, having to reconcile his own sense of right and wrong with the values he's being taught in Bellatrix's care.
One possible plot could be that Harry discovers a powerful and dark magic spell that allows him to gain control over Bellatrix. He then uses this to his advantage to gather information about Voldemort's plans from her. Harry might struggle with the moral implications of enslaving someone, even a Death Eater like Bellatrix.
One possible plot could be that Bellatrix, in a strange turn of events, decides to train Harry in the Dark Arts not to turn him evil but to make him a more formidable opponent against Voldemort. She might see his potential and think that by teaching him some of the Dark Arts, he can better understand Voldemort's tactics.
Well, the fanfic could be about how Bellatrix's daughter discovers her mother's true nature as she grows up. Maybe she was hidden away and raised by someone else. As she uncovers the truth, she has to decide whether to embrace her family heritage or reject it completely. She could also have unique magical abilities that set her apart from others in the story.
The plot could involve the son trying to redeem his mother's name. He might go on a journey to find out more about her past, hoping to understand why she became so evil. Along the way, he meets various characters who knew his mother and has to deal with their mixed reactions towards him.