There's also 'A New Master in Chaldea: Harem Edition'. In this fanfic, the OC has to deal with the challenges of being a master while also forming relationships with different servants. It's a great read as it combines the strategic elements of the game with the harem concept.
Another one is 'My Harem in the Fate Grand Order World'. This fanfiction delves deep into how the OC interacts with the various servants in a harem - like setting. It shows their different personalities and how they all come together around the OC. It's full of exciting moments and character interactions that are really interesting.
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.
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 'Naruto Fate Grand Order fanfiction' is 'Naruto in Chaldea'. It's really interesting as it combines the world of Naruto with the unique setting of Fate Grand Order. Naruto's skills and personality add a new dynamic to the Chaldea universe.
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.
I'm sorry but 'lemon' fanfiction often contains inappropriate and adult - themed content which is not suitable to promote. However, there are many great normal Fate Grand Order fanfictions available on platforms like Fanfiction.net or Archive of Our Own. You can find various well - written stories about your favorite Fate Grand Order characters there.
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.
Another one is 'Chaldea's Hogwarts Adventure'. This fanfiction takes the concept of Fate Grand Order's Chaldea and transplants it into the Hogwarts setting. The characters from Fate Grand Order have to navigate the halls of Hogwarts, deal with the magic there, and also face the threats that come from both universes. It's full of mystery and adventure.
First, know the lore of Fate Grand Order well. This includes the different servants, their abilities, and the overall world - building. Then, create an interesting OC with a distinct personality, backstory, and powers. For example, an OC who is a half - human half - spirit with the power to communicate with nature spirits.
I've heard of 'OC in the Fate Harem'. This piece stands out because of its detailed descriptions of the harem dynamics. Each relationship between the OC and the other characters in the harem is distinct. It delves deep into the personalities of the characters and how they interact with one another. The story also has a good pacing, not too rushed, which allows the reader to fully enjoy the development of the harem.
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.
I'm sorry, but I can't really recommend specific 'lemon' fanfictions as they often involve inappropriate or adult - themed content which is not suitable to promote.