Coco Adel could be a really interesting character to focus on in a RWBY Parallel Universe fanfic. Imagine if her love for fashion was not just a hobby but a crucial part of her combat strategy. In the parallel universe, she could design battle outfits that have special abilities. Also, Yatsuhashi Daichi could have a more prominent role. His semblance could be more refined, allowing him to create much larger and more complex barriers that play a vital role in protecting a new, important location in the parallel RWBY world.
Cho Chang. In a parallel universe, Cho could be a more central character. Maybe she discovers a new type of magic that is related to her Asian heritage. This could make her a target for both the good and bad sides. She could also have a more complex relationship with Harry or other characters, not just as a love interest, but as a powerful witch with her own motives and goals.
Winky the house - elf. She has a lot of potential. In a fanfic, we could explore her life after being freed from the Crouch family. Maybe she has some unique knowledge about the Dark Arts or the Triwizard Tournament that she's been hiding. Her loyalty and her struggle with her new - found freedom could be really interesting to write about.
Hot Pie. He's just a simple baker boy, but he could have an interesting story. Maybe he uses his baking skills to gain influence in a small town. He could create special pastries for lords and ladies, and in the process, get involved in local politics or even some minor intrigues.
The Dormouse could be a great character to focus on. In the original stories, it's often overlooked but it could have a much more complex backstory. Maybe it has secret knowledge about the looking - glass world that it's been too sleepy to share. Another is the Tweedle brothers. They could be explored in more depth, perhaps they have a hidden agenda that's not immediately obvious in the main story.
I think Neville Longbottom is a bit underrated in this book. A fanfic could focus on his growth during this time. He could have some secret knowledge about the plants in the Hogwarts grounds that helped in some way during the events. Also, Seamus Finnigan could be interesting. What if he had some family connection to the events in the Prisoner of Azkaban? Maybe his family knew something about Sirius Black or the Dementors. And Crookshanks is another character. A fanfic could be about his adventures around Hogwarts, and how he was actually more intelligent than people thought and was trying to solve the mystery of Sirius Black himself.
One possibility is that the relationships between the characters are altered. Weiss might find that in this parallel universe, she has a closer bond with someone she was not as close to in her own universe, like Blake. They would have to adapt to these new relationship dynamics while also trying to figure out how to get back to their own universe if that's their goal.
The old hermit character. He was only in a few scenes but seemed to know a lot. Fanfiction could explore his past and how he came to have his knowledge. There's also the young apprentice who was often overlooked. He might have some hidden powers or a special connection to the treasures that could be delved into.
One underrated character is Baltus Van Tassel. He's Katrina's father and has a big role in the town. Fanfiction could explore his backstory, like how he came to be such an important figure in Sleepy Hollow. Maybe he had some adventures in his youth that are related to the Horseman legend. Another is the schoolmaster before Ichabod Crane. What was his experience in Sleepy Hollow? What did he know about the Horseman that he might have passed on to Ichabod? And then there's the old woman who lives on the outskirts of town. She might seem like a minor character, but she could be a seer or have some connection to the supernatural forces in Sleepy Hollow.
Rock Lee is often overlooked compared to the main characters. A fanfiction could focus on his journey to become an even greater ninja without relying on ninjutsu. Another underrated character is Shino Aburame. His unique bug - related abilities could be explored more deeply in a fanfiction, like how he might use them in different and unexpected ways.
The neighbor who was briefly shown in the movie could be an interesting character to focus on. We didn't really get to know much about him, but fanfiction could explore his story, like how he managed to survive on his own for so long. Maybe he had some unique skills or knowledge that helped him. Another could be the old man who we saw at the beginning. What was his life like before the invasion? Fanfiction could give him a more detailed backstory.