A fanfiction might explore the backstory of Bellatrix's use of the Cruciatus Curse. Perhaps she was first introduced to it as a young witch at Hogwarts by some dark wizarding group. She practiced it on small animals, which led to her getting in trouble. But this early experience with the curse made her more interested in the Dark Arts, and she continued to perfect her use of Crucio as she grew older and became a Death Eater.
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.
Show the physical and mental toll it takes on the victim. For example, describe how the victim's body contorts painfully and their mind is filled with unbearable agony. Maybe the victim has nightmares about the curse long after it has been used on them.
One idea could be a story where a young Death Eater in training is forced to use the Cruciatus Curse on an innocent by his family, but he has a change of heart. He then has to deal with the consequences of defying his family's wishes and trying to protect the victim from further harm.
One interesting Imperius Curse fanfiction could be about a character who manages to break free from the curse in a unique way. For example, they might use their love for another character as a sort of shield against the curse's control. In many fanfictions, the Imperius Curse is explored in different scenarios than in the original books. It could be set in a time after the main events of the series, where a new dark wizard tries to use the curse on the heroes again.
One possible fanfiction could be about Bellatrix's time in Azkaban and how she coped with the Dementors. Maybe she had some hidden magic that she used to keep her sanity in that dark place. It could also explore her thoughts about Voldemort during her imprisonment and how her loyalty to him remained unshaken.
One possible fanfiction could involve Bellatrix going back in time to try and change the outcome of the Battle of Hogwarts in her favor. Maybe she uses time - turners or some dark magic to travel back. She could attempt to kill Harry Potter as a baby before he even becomes a threat.
It could also be shown through Hermione's facial expressions. The animator might focus on her eyes, showing the extreme pain and fear. And the background could be darkened or have some sort of chaotic elements to enhance the mood.
One possibility is that in the fanfiction, the use of the Cruciatus Curse on Hermione could be a central plot point for her character development. Maybe she endures it and it makes her stronger, more determined to fight against dark forces.
Well, it could be about many things. It might be about a new curse in the Harry Potter universe that has something to do with the concept of gemini. Maybe it's a curse that affects twins in a special way, like they have some unique powers or problems because of this curse. It could also involve Harry and his friends trying to figure out how to break this curse or deal with its consequences.
One great Bellatrix fanfiction is 'The Redemption of Bellatrix'. It shows a different side of her, exploring what could have happened if she had a change of heart. It's an interesting read as it delves deep into her character, adding layers that we don't often see in the original books.