I'm not sure what 'ymorgans' specifically means in this context. It could be some sort of made - up or very niche term. 'Fanfic' is short for fan fiction, which is fictional writing by fans based on existing works. But without more context, it's difficult to say what 'a lot of ymorgans fe fanfic' is about.
I'm not entirely sure what 'fe' means in this context. 'A lot of organs' could be a very strange or unclear statement in a fanfic. It might be some sort of creative or perhaps misused expression in a fictional writing that is not following normal language use.
Yes. First, know the character of Morgan well. Play the Fire Emblem games to understand their backstory, personality, and relationships. This knowledge will help you create more authentic stories.
You can try fanfiction websites such as Archive of Our Own (AO3). It has a large collection of various fanfics, including those related to Morgan in Fire Emblem. Just use the search function and type in relevant keywords.
No, not really. Given that 'a lot of organs fe fanfic' is such an ambiguous phrase. If we were to think about it in terms of horror fanfic, maybe there could be a story where a mad scientist is collecting a lot of organs for some evil experiment. But again, this is stretching it without knowing what 'fe' means exactly. It's not possible to give proper and accurate examples with this much uncertainty.
I'm not sure specifically what 'code name fe fanfic' is about as it could be a very specific fan - created work. It might be a fanfic related to a game or series with the initials 'FE' (perhaps Fire Emblem?), but without more context it's hard to say more.