A really interesting plot twist could be that Roy and Riza are from a different time or dimension and they end up in Edward's world and become his parents. This could introduce all kinds of crazy elements into the story, like different alchemical rules or cultural differences. Edward would have to deal with the fact that his parents are so different from everyone else and that they might be in danger because of their origin.
Roy and Riza would probably have a very hands - on approach to Edward's growth as an alchemist. Roy, with his knowledge of alchemy and military tactics, would teach Edward how to use alchemy in combat situations. Riza, on the other hand, would instill a sense of discipline and respect for the rules of alchemy. Their combined influence would make Edward a well - rounded alchemist. He would not only be skilled in performing transmutations but also understand the ethical and practical implications of his actions. This would help him grow not just in terms of his alchemical abilities but also as a person who uses alchemy responsibly.
One popular plot twist could be that Roy discovers he has some sort of family curse that might affect the baby. Another could be that Riza has to go on a dangerous mission while pregnant and Roy is desperate to keep her safe. Or perhaps there's a twist where they find out the baby has some extraordinary powers.
One popular trope is the 'lost past' trope. Maybe their parents had a secret past that gets uncovered in the fanfiction. For example, they could have been part of a secret organization. Another is the 'legacy' trope, where Roy and Edward discover something important about their parents that has a big impact on their own lives, like a hidden power or a mission they left unfinished. And of course, there's the 'family secrets' trope, which often involves things like hidden relationships or events that were never spoken of before.
Often, their father might be depicted as a strong and stoic figure. He could be a great leader type, someone who was respected in his community or among his peers. Their mother, on the other hand, could be seen as a nurturing and kind - hearted person. Maybe she was the one who taught Roy and Edward important values when they were young, like compassion and loyalty.
One common theme is loyalty. Roy and Riza are often depicted as being extremely loyal to each other, whether it's in the face of danger or political intrigue.
One idea could be their life adjusting to married life in a small cottage. Roy could be learning to cook for Riza, leading to some comical kitchen disasters. Another could be them dealing with the pressures of their jobs while maintaining a happy marriage, like Roy having to work late on important military projects and Riza being supportive yet also missing him.
One possible plot twist could be that Harry's parents were actually in hiding all this time and had faked their deaths to protect Harry from an even greater threat. Another could be that they were turned into different forms and were secretly living among the wizarding community without Harry knowing.
Perhaps there is a mystery involving a powerful alchemical artifact. Edward and Roy both get wind of it and decide to work together to find it. Along the journey, they face various obstacles like other alchemists who also want the artifact. They have to use their combined knowledge and skills to outwit their opponents and solve the mystery behind the artifact. As they progress, their relationship evolves from mere acquaintances to comrades who trust each other deeply. This could involve some character development for both of them, with Edward learning more about discipline from Roy and Roy learning about the importance of following one's heart from Edward.
One possible plot twist could be that Naruto's parents, Minato and Kushina, are resurrected but they have lost their memories. This would create a whole new dynamic as Naruto has to help them regain their past while also dealing with his own emotions of having them back. Another twist could be that their resurrection is part of a larger, darker scheme by an old enemy who wants to use them against Naruto. For example, the enemy might be able to control them to some extent and make them fight Naruto, which would be a heart - wrenching situation for Naruto as he has to face his beloved parents in combat.
The theme of family is also prevalent. It's not just about Roy, Riza, and the baby. It often includes their friends and comrades from the military who become like extended family, helping out with the baby or just being there for moral support during the challenging times of raising a child.