Another plot could be a time - travel fanfiction. Harry and Barty Crouch Jr. are sent back in time to a crucial point in wizarding history. They have to work together, despite their differences, to fix something that went wrong in the past. This would force them to understand each other better and perhaps even form an unlikely friendship.
A possible plot is that Barty Crouch Jr. somehow survives the events at the end. He is redeemed in a sense and decides to help Harry fight against a new, emerging dark threat. Harry is initially very suspicious but gradually comes to trust him as they face the new enemy together.
Well, one interesting plot might be a time - travel fanfiction. Barty Crouch Jr goes back in time to prevent himself from ever getting involved with Voldemort. This could lead to a whole different series of events in the Harry Potter universe. Maybe he ends up becoming a key figure in fighting against the Dark Arts in a more positive way. He could also have an adventure where he teams up with other characters who were previously his enemies in the original timeline, like the Aurors, to take down some new dark threat.
Perhaps a time - travel plot where Hermione goes back in time and somehow crosses paths with a younger Barty Crouch Jr. She tries to prevent him from going down the dark path he eventually takes in the original story. It would be full of moral dilemmas and interesting character interactions.
The relationship could start with hostility. Harry, knowing all the bad things Crouch Jr. has done, is full of hatred. But as the story progresses, he could learn about Crouch Jr.'s tragic backstory, which might make him more empathetic.
Bartemius Crouch Junior was a character in the Harry Potter series by British author J. K. Rowling. He was the second son of Barty Crouch, the Director of International Magical Exchanges and Cooperation, a pale, pale-haired young man who was also a Death Eater and Dark wizard. As a teenager, he became a loyal follower of Voldemort, and together with Bellatrix Lestrange and Rodolfo Lestrange, he tortured Neville Longbottom's parents, leading to their arrest and life imprisonment. After he was arrested, his mother begged her husband to save him on the condition that she was dying, and he became the first person to escape from Azkaban Prison in recent history. In the 1994 - 95 school year, he disguised himself as Mad-Eye Moody as the Defense Against the Dark Arts professor at Hogwarts, manipulated the Triwizard Tournament, and assisted in the resurrection of Voldemort. He kept Moody in a box with seven locks, and used Moody's hair to make Polyjuice Potion to maintain his disguise. Later, his identity was exposed, and he was kissed by a dementor brought by Cornelius Fudge and lost his soul. He had a close relationship with the Lestrange family, and they had tortured the Longbottoms together. During the trial, he firmly denied his crimes and begged his parents to save him but failed. Many believed that he had been neglected by his father, and that Crouch Sr. had been too focused on promotion to spend much time with his family. He had escaped Azkaban because his mother had used Polyjuice Potion to make him look like him, and her mother had died alone in prison. During the Quidditch World Cup match between Sofia and Iceland, he had sat in the seat next to his father in the Invisibility Cloak (accompanied or watched by Winky the house-elf), then had broken free of the Imperius Curse, taken Harry's wand, and fired the Dark Mark to create chaos. In addition, there are many clues in the novel that suggest that he is pretending to be Mad-Eye Moody, such as Mad-Eye Moody's performance in the first class, the explanation of the Goblet of Fire incident, the nervous twitch, Winky's strange behavior, and the Dark Magic detector. In the Harry Potter movies, Barty Crouch Jr. was played by David Tennant. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
Well, there's a fanfiction called 'Barty Crouch Jr: A Different Path'. In this one, the author imagines what would have happened if Barty Crouch Jr had not followed Voldemort. It gives a whole new perspective on his character. Also, 'The True Nature of Barty Crouch Jr' is really interesting as it tries to uncover the real motives behind his actions in the original story.
David Tennant and David Bradley played Barty Crouch in Harry Potter and the Goblet of Fire. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
The idea of Barty Crouch Jr saving Harry and a romance developing is quite interesting. Barty Crouch Jr, who was involved in so many dark deeds, could be given a new path in this fanfiction. When he saves Harry, it's like a new beginning for both of them. Harry, being the hero we know, might be initially shocked but then drawn to Barty. The romance could be a slow - burn one. They might start as friends, with Barty protecting Harry from other threats that lurk in the wizarding world. As time passes, their bond deepens into love, and they have to face the challenges of their different backgrounds and the reactions of the wizarding community.
Barty Crouch Jr. was not a good teacher. His purpose in the 1994 - 95 school year, when he was disguised as Mad-Eye Moody as the Defense Against the Dark Arts professor at Hogwarts, was to manipulate the Triwizard Tournament and assist in the resurrection of Voldemort, not to teach. He was also typical of the Death Eaters in class, for example, in the first lesson, where instead of warning students about the dangers of the Dark Arts, he spoke and even displayed jinxes with obvious interest. Barty Crouch, therefore, did not possess the qualities and conduct of a good teacher. Harry Potter and the Goblet of Fire was not enough. Everyone, please click to read the novel!
It's also interesting because the OC can bring a fresh perspective. For example, an OC could be from a different background or have different magical abilities. This allows for new storylines to develop. For instance, an OC with the power to see the past might be able to uncover more about Barty Crouch Jr's childhood, adding depth to his character in the fanfiction. Also, the relationship between the OC and Barty Crouch Jr can be explored in various ways, from friendship to love or even rivalry, which keeps readers engaged.
The exploration of his motives. In many fanfics, they dig deep into why he was so loyal to Voldemort. It could be his thirst for power or some deeper psychological reason.