Well, these kinds of fanfictions often explore different aspects of the Servant - Master relationship. Since it's an SI OC Servant, the story can take a very personal turn. The author can play with the idea of how a modern - day person, if inserted into the FGO world as a Servant, would react to the historical and mythological figures around them.
One of the things that makes it special is the freedom to create. Writers can design their own Servant with any kind of powers, appearance, and personality. It's like creating a brand - new character in the rich world of Fate Grand Order.
One interesting Fate Grand Order OC Servant fanfiction could be about a new Servant with the power of time manipulation. This Servant could be from a lost era and has unique abilities that change the course of battles in the Holy Grail War. Their backstory might involve a tragic past related to the misuse of time magic, which makes for a great plot device.
First, you need to create your OC Servant. Decide on their class, like whether they're a Lancer or a Rider. Then, think about their origin. Are they from a historical period, a fictional world, or a lost civilization? After that, work on their abilities. It should be something unique and relevant to their origin. For example, if they're from a water - based civilization, they might have water - related powers.
One common theme is power dynamics. The OC often has to navigate their relationship with powerful servants, who may have different levels of loyalty or attraction. For example, in some fanfics, a servant might initially be dismissive of the OC but later become part of the harem as they see the OC's growth or hidden strength.
One idea could be creating an OC who is a time - traveling mage from a future where the Grail Wars have had catastrophic consequences. This OC could be on a mission to change the past to prevent the disasters. Another idea is an OC that is a hybrid of a Servant and a human, with unique abilities and a complex backstory that ties into the existing lore of Fate Grand Order. Maybe an OC who was experimented on by the mages in Chaldea and gained strange powers as a result.
One interesting story could be about an original character (OC) who has a unique ability and gets involved in the complex plot of Fate Grand Order. For example, an OC with time - controlling powers that changes the outcome of a certain battle.
Fate Grand Order Tiamat fanfiction can also take a more creative turn. It could be set in an alternate universe where Tiamat has a different origin or purpose. Writers might explore her personality in more depth, perhaps showing a side of her that is more benevolent or at least more nuanced than what we see in the game.
Tiamat is such a powerful being in Fate Grand Order, and fanfiction gives the chance to explore what if scenarios. What if she joined forces with the heroes? Fanfictions can play with these ideas and create unique and exciting stories that deviate from the main storyline.
It adds more depth to Mash's character. By exploring different scenarios in fanfiction, fans can get a better understanding of her potential and different sides of her personality. This in turn enriches the overall perception of Mash within the Fate Grand Order fandom.