Well, Saber is often a key figure in Holy Grail War stories. In this fanfic, she could be involved in some way with Emiya. Maybe they cross paths and have to decide whether to fight or cooperate. Additionally, Gilgamesh might make an appearance. His over - the - top personality and powerful abilities would surely create some interesting dynamics when interacting with Emiya.
Well, perhaps in this fanfic, Emiya has to face some moral dilemmas during the fourth war. He might be forced to make choices between saving civilians and achieving his goals in the war. Also, his relationship with his Master could be explored in a new light. What if his Master has a hidden agenda that conflicts with Emiya's own sense of justice? That would surely add a lot of drama to the story.
The Emiya ending in the Fourth Grail War fanfiction often shows his complex character. He is a hero with a strong sense of justice. In this ending, he might face difficult choices. Maybe he sacrifices himself to save others, which is in line with his selfless nature.
One key element is Emiya's determination. His unwavering will to do what's right is a big part of the ending. He won't be swayed by the temptations of the Grail. Another element is his relationships. His connection with other characters, like how he helps or is helped by them, can greatly affect the ending.
One idea could be exploring Archer's internal struggle more deeply. Maybe show his memories of past battles and how they affect his decisions in the Fourth War. Another could be to create a scenario where Archer has to team up with an unexpected character from the Fate universe.
Servants are also often main characters. For instance, Saber, with her noble and powerful presence. In the fanfic, she might have different relationships with other characters compared to the original. Her backstory and her connection to the Grail War are important elements that make her a main character.
How about adding some characters from the Fate/Extra series? For instance, Nero. Her strong - willed personality and combat skills would surely spice things up when paired with Archer in the Fourth War. And then there's Tamamo - no - Mae. Her charm and tricky nature could lead to some really engaging storylines involving Archer.
The relationships between the characters can also be an interesting concept. In the fanfic, characters who may not have interacted much in the original could form strong alliances or rivalries. It can show how different personalities clash or complement each other in unexpected ways.
The character of Shirou himself. He has a complex personality and set of ideals. In a war fanfic, his struggle to uphold his beliefs while facing the chaos and destruction of war is really engaging.
However, some fanfics in this genre can have their drawbacks. Sometimes they might deviate too much from the established lore of the Fate universe. But if done right, like in this case potentially, it can add a new layer of depth to the story. It could introduce new plot twists that keep readers on their toes, and the character development of Archer could be taken to new heights, exploring his past and how it affects his actions during the Fourth War.