One idea could be a time - travel fanfiction where Hermione goes back in time and has to face Bellatrix in a magical duel. Harry could be caught in the middle, trying to protect Hermione. Maybe Bellatrix has a secret that could change the course of the wizarding war, and Hermione discovers it.
One idea could be a story where Hermione and Draco are paired up for a special project at Hogwarts. They start off hating each other as usual, but as they work together, they begin to understand each other better. Harry could be suspicious at first, but then realizes that their newfound friendship could be beneficial for the wizarding world. For example, Draco might share some Slytherin secrets that help in a battle against the dark forces.
One idea could be a time - travel plot where Hermione somehow gets sent back in time and has to deal with a younger Bellatrix. Maybe she tries to change Bellatrix's path to the dark side. Another could be a magical duel between Hermione and Bellatrix where Harry is caught in the middle, forced to choose which side to help. Or a plot where Bellatrix, under some sort of spell, has to team up with Hermione and Harry to fight a greater evil.
One possible fanfiction could be about Hermione discovering Snape's hidden past and his true motives. She might initially be skeptical but as she delves deeper, she realizes that Snape was more complex than she thought. For example, she could find out about his love for her mother's friend Lily and how that influenced his actions throughout the series.
Well, in this fanfiction, perhaps there's a time - travel element. Hermione goes back in time and somehow gets involved with Bellatrix in a way that changes their relationship. Bellatrix might be less extreme in her younger days, and Hermione's modern ideas influence her. This could lead to a relationship that blossoms into marriage over time.
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.
One great fanfiction could be where Harry, Hermione, and Ginny go on a secret mission together. Maybe they discover a hidden chamber in Hogwarts that was unknown even to Dumbledore. They have to use their combined skills - Harry's courage and Quidditch skills, Hermione's vast knowledge, and Ginny's powerful magic - to solve the mystery within the chamber.
There might be a fanfiction where Harry Potter encounters Bellatrix and Narcissa in an unexpected way. For example, they could be in a situation where they need to cooperate with Harry to solve a mystery related to an ancient magic artifact. This would force them to put aside their Death Eater - Order of Phoenix differences and create a unique plot full of tension and discovery.
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.
Hermione is often portrayed as the intelligent and resourceful one. She uses her vast knowledge of magic to outwit Bellatrix. Bellatrix, on the other hand, is usually shown as the wild and unpredictable dark witch. Her loyalty to Voldemort makes her a formidable foe for Hermione.
One idea could be that a Muggle teacher accidentally stumbles upon the wizarding world while Hermione, Ron, and Harry are on a mission near a Muggle area. The Muggle teacher could initially be in shock but then become intrigued and start helping them in unexpected ways, like using Muggle technology to solve a magical problem.