To create a compelling OC homunculus, start with its motivation. What does it want? Is it power, acceptance, or something else? Then, think about its relationships. Does it have an ally among the human alchemists or is it at odds with all of them? Also, consider its powers. Make them interesting and related to the Fullmetal Alchemist lore. For instance, it could have the ability to manipulate a specific type of metal in a way that's different from the main characters. And don't forget to give it flaws. A homunculus that is too perfect won't be as engaging.
There are also fanfics where the reader is on a quest to understand the origin and nature of the Homunculus. They might team up with characters from the original series like Edward and Alphonse Elric to uncover the secrets of the Homunculus. Along the way, they could develop romantic or platonic relationships with the Homunculus or the other characters. This type of plotline often delves deep into the lore of Fullmetal Alchemist and can be really engaging for fans who want more in - depth exploration of the series' concepts.
Some common themes include the search for humanity. OC homunculi may strive to understand and possess human qualities, such as emotions and empathy. The theme of family also exists. They could be searching for a sense of family or dealing with the concept of family in a world where they are often seen as outcasts. Additionally, there's the theme of fate. Do homunculi have a pre - determined fate, or can they change it? Fanfictions often play with this idea.
You can start by looking on fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. AO3 has a wide range of categories and tags, so you can easily search for 'Fullmetal Alchemist' and then narrow it down to reader - insert and Homunculus - related fanfics. FanFiction.net also has a large collection, though the search might be a bit less refined.
A great part of Homunculus Edward fanfiction is the creativity in the plot twists. Writers can introduce unexpected elements. Like, what if Edward's alchemy was affected by a homunculus in a way that made him able to do things he never thought possible? This can lead to really engaging stories that keep readers on their toes.
I'm not sure specifically as there could be many interpretations. It might be a fan - created story where a character named Percy is depicted as a homunculus. A homunculus in some fictional concepts is a small, artificially created human - like being, so perhaps the fanfiction explores Percy's adventures or experiences as such a being.