One great 'riza hawkeye x roy mustang fanfiction' is 'The Unspoken Bond'. It beautifully explores their relationship dynamics, from their loyalty to each other in the military context to the unspoken feelings that simmer beneath the surface. The author does an amazing job of staying true to the characters' personalities as we know them from the original source.
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.
The Roy x Riza relationship in Fullmetal Alchemist fanfics can be quite diverse. Some fanfics focus on the power dynamics between them. Roy is a high - ranking officer, and Riza is his subordinate. This can create an interesting tension in a romantic context. Additionally, their mutual respect for each other's skills, Roy's ambition, and Riza's loyalty are often central themes. Fanfic authors might also explore how they support each other during difficult times in the story's universe, like dealing with the political intrigue and the consequences of alchemy.
In 'jealous Roy x Riza fanfic', the theme of miscommunication is quite common. Roy's jealousy is often due to a misunderstanding or miscommunication between him and Riza. Also, the theme of internal conflict is present. Roy battles within himself, between his rational side and his jealous emotions. And finally, there's the theme of growth. As the story progresses, Roy usually has to grow and learn to handle his jealousy in a more mature way for the sake of their relationship.
Fanfiction.net is another option. There are often a good number of fan - created stories about different pairings, including 'roy x riza'. Browse through the relevant categories.
You can start by looking on Archive of Our Own (AO3). It has a vast collection of fanfictions, and you can easily search for Roy Mustang x Riza Hawkeye stories there. Just type in their names in the search bar.
One good story could be 'The Unspoken Bond'. It delves deep into the unspoken understanding between Roy and Riza. It shows their relationship evolving from just comrades to something more profound, with beautiful descriptions of their shared glances and unsaid emotions.
A theme that frequently shows up is protection. Roy wants to protect Riza, and she wants to protect him in return. Fanfiction may depict scenarios where one has to put themselves in harm's way to safeguard the other. Also, the theme of redemption can be present. If Roy has made mistakes in his pursuit of power, Riza might be the one to help him find his way back, and this kind of story arc is often explored in fanfiction.
There are quite a few 'roy x riza' fanfictions that are worth checking out. For example, 'A New Beginning' which is about them starting a new chapter in their relationship after a major event in their world. It shows their growth as individuals and as a couple. Some fanfictions also play with the idea of alternate universes, like one where they are in a modern-day setting instead of their usual world, which gives a fresh take on their relationship.
Another option is Tumblr. There are many fanfic writers who post their works there, either in full or as previews with links to where you can read the full story. You can search for relevant tags like #riza hawkeye x roy mustang fanfiction to find some interesting pieces.