Well, in the Haunting Ground game story, Fiona finds herself in this really spooky castle. There are these menacing enemies like the Scissorwalker. The story unfolds as she tries to figure out how she got there and how to get out. The castle has many secrets and hidden areas. As Fiona progresses, she discovers more about the dark history of the place, which adds to the overall sense of dread and mystery.
One key element is Fiona as the protagonist. Her vulnerability and determination drive the story. Another is the castle setting. It's a character in itself with its dark corridors and hidden rooms. The enemies, like the Scissorwalker, are also a key element as they create the constant threat that Fiona has to face.
Well, one interesting aspect could be the unique interpretations of the characters. For example, the way a fan might rewrite a character's backstory to add more depth or change their motives in a way that still fits within the 'Haunting Ground' universe. Another could be the exploration of different relationships between characters that were only hinted at in the original game.
First, you need to be familiar with the 'Haunting Ground' world. Know the characters, the setting, and the overall mood. Then, come up with an interesting concept. It could be something like a 'what - if' scenario, for example, what if a certain character had a different power? Next, start writing, focus on creating a good flow and keep the horror and mystery elements that are characteristic of 'Haunting Ground'.
Another plot idea is that Fiona's pregnancy is not a normal one. There could be some sort of dark magic involved. As she progresses through her pregnancy, she has to not only deal with the regular threats of the Haunting Ground but also figure out what is wrong with her pregnancy. She might meet a mysterious figure who claims to know how to save her and the baby, but she has to trust them and complete dangerous tasks.
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.