One possible fanfiction idea could be that Cinder and Pyrrha are long - lost sisters separated by some dark event in their past. In this fanfic, Cinder could be on a journey of redemption after realizing her sister is Pyrrha. Pyrrha, on the other hand, might struggle with the idea at first but then come to accept Cinder. Their relationship could develop as they face common enemies in the RWBY universe.
Cinder is often portrayed as complex. Her usual cold and calculating nature might be softened in fanfiction when it comes to her relationship with Pyrrha. She could show vulnerability that she doesn't usually display. Pyrrha, on the other hand, is typically shown as the more empathetic and moral one. She might be the one to reach out to Cinder and try to understand her motives.
In a fanfiction centered around their sisterly bond, Cinder and Pyrrha might have a telepathic connection due to their sisterhood. This could be used in battle situations, like when Pyrrha is in trouble, Cinder senses it and comes to her rescue. Their bond could also be a source of inner strength for both of them, especially in the face of the great challenges in the RWBY world.
One possible storyline could be a redemption arc for Cinder through her relationship with Pyrrha. Maybe in an alternate universe, Cinder realizes the error of her ways and Pyrrha helps her to change. They could start as enemies but gradually come to understand each other.
It would greatly affect her relationship with Emerald and Mercury. They might be confused as to why Cinder is so interested in Pyrrha. Emerald could feel jealous, thinking that Cinder is replacing her with Pyrrha in some way. Mercury, on the other hand, might just be indifferent or find it strange.
One possible plotline could be that Cinder starts off secretly admiring Pyrrha's combat skills. Maybe she spies on Pyrrha's training sessions and tries to learn from her techniques. This could lead to a situation where Cinder has an internal struggle between her admiration for Pyrrha and her own dark motives in the main RWBY storyline.
First, you need to understand the characters well. Pyrrha is a heroic and selfless character, while Cinder is complex and often villainous. You should explore their personalities and how they would interact. For example, Pyrrha might try to appeal to Cinder's better nature. Second, create an interesting setting. It could be a post - apocalyptic Remnant or a parallel dimension. Third, develop a plot that has a clear goal. Whether it's about them becoming allies or something else, make sure the story progresses logically. Don't forget to add some action and emotional moments to keep the readers engaged.
The fanfic could be about a battle - of - wits - and - powers between them. Cinder is a powerful antagonist, and Pyrrha is a strong and noble huntress. They cross paths during a major conflict. Instead of an immediate fight to the death, they engage in a series of challenges, both physical and mental. As they compete, they start to understand each other better. Pyrrha realizes that Cinder has a tragic backstory that led her to become who she is, and Cinder sees in Pyrrha the strength and determination she once had. This could lead to a change in their relationship dynamic.
The relationship can be developed through shared experiences. For example, if they are put in charge of a difficult mission together. They will have to communicate, trust each other, and rely on each other's skills. This will create a bond between them. Another way is if Pyrrha has some personal problems, like dealing with her fame as a champion. Glynda can offer her advice based on her own experiences. This will make Pyrrha see Glynda as a mentor and a friend.
One common theme is friendship. Given their relationship within the RWBY universe, fanfictions often explore how their friendship could develop into something deeper. Another theme is adventure. They are both part of a team in RWBY, so stories might involve them going on adventures together and growing closer during those experiences.