Well, in fanfiction, Edward and Roy's dynamic can be really interesting. They have different personalities. Edward is young and impulsive, while Roy is more reserved and calculating. This contrast can lead to some really engaging storylines in fanfiction, like when they work together on a mission and Edward's quick actions either save or almost ruin the plan.
There's a fanfic called 'Lady Edward'. In this story, the female Edward is depicted as a very strong - willed character. She has to prove herself in a world that initially doubts her abilities because of her gender. The story also weaves in some interesting sub - plots about her relationship with Alphonse. It's really engaging as it shows how she uses her intelligence and alchemy skills to make her mark in the story, much like the original Edward would, but with a feminine touch.
Maybe Edward dies in a fight against a powerful new enemy. This enemy could be someone who has mastered a dark form of alchemy that Edward couldn't counter. His death could then inspire the other characters, like Winry, to take up arms in a different way. She might use her skills as an automail engineer to create weapons that can defeat this new threat, all while mourning Edward and vowing to make his death count.
Often, fanfiction writers focus on the character growth that can occur through their interactions. Edward, who starts off as a headstrong and somewhat naive alchemist, can learn a great deal from Roy's strategic thinking. Roy, in turn, might be inspired by Edward's unwavering belief in doing what's right, regardless of the consequences. Their relationship could also be a source of conflict, as their personalities and goals don't always align.
The concept of a female Edward in Fullmetal Alchemist fanfic is interesting because it flips the gender script. It allows for new interpretations of the character's relationships, like how she might interact with Roy Mustang or Winry Rockbell differently. Also, it can explore how a female in a male - dominated world of alchemy would break barriers.
If Edward dies, it would have a huge impact on Alphonse. Alphonse has always relied on Edward, and without him, he would be lost at first. But this could also be a turning point for Alphonse to become more independent and find his own path in life. He might start to question the things they've been doing in their search for the Philosopher's Stone and find a new purpose.
One great fanfiction could be where they go on an adventure together to find a rare alchemical ingredient. It could show their relationship growing as they face challenges side by side. Edward's determination and Winry's mechanical skills would complement each other during the journey.
Often, in fanfictions, their relationship deepens during times of crisis. Say, when Edward is in danger and Winry has to step in to save him. This shows her strength and makes Edward see her in a new light. Their bond then grows as they realize how much they mean to each other.