Balalaika is often portrayed as a powerful and intimidating figure. In fanfiction, she could be the driving force behind a major plotline involving Eda. Maybe she recruits Eda for a special task that only Eda can do because of her connections in the underworld.
It depends on the nature of the fanfiction. If it adheres to the general rules of respect and propriety, and doesn't involve inappropriate or offensive content, it can be an acceptable form of creative expression within the fan community.
One key element is the exploration of their different personalities. Camilla is often depicted as strong - willed and protective, while Corrin is more idealistic. Their interactions based on these traits form a big part of the fanfiction.
You can try looking on some popular fanfic websites like Archive of Our Own (AO3). There are often a wide variety of fanfics for different pairings, and it's likely that you'll find some for Female Corrin x Camilla there.
One common theme is loyalty. Camilla and Corrin often show deep loyalty to each other in these fanfics. Another theme is sacrifice, as they might be willing to give up things for the other's sake.
One common theme is loyalty. Given their relationship in the source material, loyalty to each other often plays a big part in fanfiction. Another theme could be protection, with either Corrin or Camilla being very protective of the other.
There's no way to tell for sure who Camilla is just from this title. She could be a real person from the past, like an ancestor or a historical figure in a small community.
One popular theme is loyalty. Given their connection in the game, fanfics often explore how loyal they are to each other. Whether it's facing external threats or internal conflicts within their group, their loyalty is put to the test.
The fanfiction often delves into their backstories and how it affects their relationship. Corrin's journey and Camilla's past experiences can be intertwined in these stories. It could be that Corrin's growth as a character is influenced by Camilla, and vice versa. This mutual influence can be a central theme in many Fire Emblem Corrin x Camilla fanfictions.
A theme that often shows up is mystery. Maybe there are secrets about Camilla that the male reader helps uncover, or they get involved in some sort of mystery together. Also, there can be themes related to power dynamics. Camilla might have certain powers or a high status, and how that affects her relationship with the male reader is explored in some fanfictions.