One common theme is the crossover of magic systems. RWBY has its own unique magic with Dust and Semblances, while Fullmetal Alchemist has alchemy. Writers often explore how Alphonse's alchemy would interact with RWBY's magic.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including RWBY and Fullmetal Alchemist (where Alphonse Elric is from). Just search for 'Alphonse Elric RWBY' in the search bar, and you'll get a list of relevant fanfictions.
One aspect of Alphonse Elric x Reader fanfiction is the exploration of Alphonse's gentle and kind nature. The reader in these stories usually gets to experience his selfless side up close. For example, he might sacrifice his own well - being for the reader's safety. These fanfictions can also delve into how the reader helps Alphonse cope with his past traumas and his longing to regain his original body.
There are definitely some. You could try searching on platforms like Archive of Our Own. They usually have a wide range of fanfictions. But when it comes to 'lemon' fanfictions, they might be a bit harder to find as they need to adhere to the site's rules. Some may be tagged in a way that makes them discoverable if you look closely.
One great 'Edward and Alphonse Elric Fanfiction' is 'The Brothers' Bond'. It really delves deep into their relationship, showing how they support each other through various challenges. Another interesting one is 'Alchemy's Sons'. It explores their journey in a different light, adding new elements to their story.
I really like 'Alphonse's Redemption'. In this fanfic, Alphonse goes on a quest to make amends for things he feels guilty about. The author does an amazing job of expanding on his relationships with other characters in a believable way.
One great Alphonse Elric x Reader fanfiction is 'A Bond Beyond Alchemy'. It beautifully portrays the growing relationship between the reader and Alphonse. The story is well - written with vivid descriptions of their interactions.
Some fanfics to check out are 'Brotherly Love in Amestris'. This one takes a more in - depth look at their relationship within the context of the Amestris world. It shows how their love for each other is a driving force. 'The Elric Brothers' Growth' is also a good read. It follows their development as individuals and as a duo. It shows how they grow together and learn from each other. Also, 'Edward and Alphonse: A Bond Beyond Alchemy' is interesting as it explores their relationship outside of the typical alchemy - related events.
The plot should also be engaging. It could be something like Alphonse facing a new threat or embarking on a personal journey of growth. For instance, a plot where he has to save a town using his alchemy skills in a new and unique way can be really interesting.
One popular theme is the clash of different magic or power systems. For example, when Alphonse from 'Fullmetal Alchemist' crosses over into a world with different rules, like a world of elemental magic. The contrast between his alchemical knowledge and the new magic is always exciting to explore.