What are some interesting plots in 'Harry is betrothed to Voldemort' fanfiction?

Another plot could be the development of the relationship between Harry and Voldemort. At first, they would be extremely hostile towards each other. But as time passes, they might start to understand each other in unexpected ways. For example, Harry could teach Voldemort about love and friendship, concepts that Voldemort has long discarded, which could potentially change Voldemort's dark path.

Perhaps a plot where Harry tries to understand Bellatrix Lestrange's family better through his betrothal to a Lestrange. He could discover secrets about the family that change his perspective on the wizarding world's power dynamics. It might involve him delving into the family's past, their dark magic practices, and how he can either change or adapt to being part of that family in a way. This could lead to all sorts of adventures and self - discovery for Harry.

One interesting plot could be that they are mates due to a powerful ancient magic that was long forgotten. This magic forces them to understand each other's pasts and they start to question their long - held enmity. For example, they might discover that they both had difficult childhoods which led them to their current paths, and this newfound understanding makes them consider a different future together.

There could also be other important characters. For instance, Hermione Granger. She would be very concerned about Harry's situation. She might try to research ways to break the betrothal using her vast knowledge of magic. Ron Weasley too would be involved, probably being more impulsive in his attempts to save Harry from this strange and dangerous situation.

In some of these fanfictions, the plot might involve Harry and Voldemort having a secret family connection. For example, they could be distant cousins through some convoluted wizarding family tree. This changes how they view each other and the conflict between them.

In some stories, their friendship could start from a time - travel accident. Harry gets sent back in time and ends up befriending a young Voldemort. He tries to influence Voldemort's path, and they form an unlikely bond. Harry might introduce Voldemort to different values and ideas that were not present in Voldemort's original upbringing, which causes a major shift in the future of the wizarding world.

Perhaps in the fanfiction, Harry gives up because he becomes disillusioned with the wizarding world. He may see all the corruption and prejudice within it and decides that Voldemort's way of ruling might not be much worse. This could lead to a story where Harry actually joins Voldemort's side, not as a slave but as an 'advisor' of sorts, trying to change Voldemort from the inside. However, this is a very dangerous and morally ambiguous path for Harry to take.

In some fanfictions, young Harry might kill Voldemort by accident. For example, he could be exploring an old, forgotten chamber in Hogwarts and stumble upon a powerful magical artifact. When he touches it, it releases a burst of magic that targets Voldemort's main soul fragment, wherever he is. This causes Voldemort to perish instantly, leaving Harry to deal with the aftermath and the shock of what he has unknowingly done.

One interesting plot could be that they are distant relatives through some ancient wizarding bloodline. Maybe there was a curse placed on the family long ago that led to their enmity.

One possible plot could be that Harry, influenced by his darker side, joins Voldemort to gain power. He might start to learn the Dark Arts from Voldemort directly. Another plot could be that Harry believes Voldemort has some secrets about his family that he can only learn by getting close to him. Also, it could be that Harry is tired of the Order's way and thinks Voldemort's methods are more efficient in achieving his own goals.