A common trope is the 'protective harem'. In Fate Grand Order harem fanfiction, the Servants in the harem often feel the need to protect the Master (the protagonist). This can lead to some interesting scenarios where they compete to be the best protector. Also, the 'unexpected bond' trope is quite popular. It's when two characters who seem very different at first end up having a deep connection within the harem. For instance, a heroic Servant and a more villainous - like Servant might form an unexpected bond over their shared love for the Master.
One popular theme is alternate timelines. Writers like to explore what would happen if certain events in the game had different outcomes. For example, if a Servant had made a different choice during a crucial battle. Another theme is character relationships. Fans often delve into the relationships between different Servants, like how a friendship or rivalry might develop further. And of course, there's the theme of power - imagining Servants with enhanced or new powers and how that would change the story.
Perhaps a plot where Ritsuka's harem has to work together to defend a certain area from powerful enemies in the 'Fate Grand Order' universe. The harem members might have different strategies based on their unique abilities, and Ritsuka has to manage them all.
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 popular theme could be alternative storylines for certain characters. For example, exploring what would happen if a character had a different backstory or made different choices in the Holy Grail War. Another theme might be romantic relationships between characters that are not as explored in the original game. However, it's important to note that when it comes to fanfiction, it should be in line with the general ethics and not contain inappropriate content.
Jeanne d'Arc is also frequently seen in such fanfictions. Her noble and kind nature makes her a great addition to Ritsuka's harem. And then there's Scathach, with her powerful and mysterious persona, she can bring a lot of interesting dynamics to the harem in the fanfiction.
One popular theme could be Mash's growth and development. In many fanfictions, they explore how Mash evolves as a character within different scenarios. Another theme might be her relationships, like her friendship with the protagonist in Fate Grand Order. It could also involve her facing challenges and how she overcomes them with her unique abilities.
One popular Fate Grand Order OC Harem fanfiction is 'The Summoned's Journey'. It has an interesting plot where the original character gets involved with multiple servants in a unique harem situation. The character development is well - done, and it keeps you engaged throughout.
First, you need to be familiar with the Fate Grand Order universe. Know the characters, their backstories, and their abilities. Then, decide on the main character, usually the Master. Next, think about the relationships you want to develop in the harem. You can start with a simple idea like a new Servant arriving and how they interact with the existing ones in the harem. Also, consider the plot, whether it's about saving the world or just the daily adventures in Chaldea with the harem.
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.