Well, one possibility could be that Archer finds himself in a world where he's surrounded by various female characters from the Fate series. Maybe he has to protect them all while also dealing with his own internal struggles. For example, he might be torn between his loyalty to different characters and his growing feelings for the harem members.
In a Fate Archer harem fanfic, perhaps there's a villain who is trying to use the harem members against Archer. So, Archer has to not only keep the girls safe but also figure out the villain's motives and stop them. Along the way, there could be a lot of romantic tension, like Archer accidentally getting into compromising situations with the different girls, which leads to misunderstandings and comical moments as well as deeper emotional connections.
Artoria Alter could also be in the harem. Her different personality compared to regular Saber, being more ruthless and cold on the surface, would add an interesting layer to the relationships in the harem. And then there's Taiga Fujimura. She's more of a comical character but could provide some light - hearted moments in the harem, while also having her own charm that might attract Archer in a different way.
The Archer in Fate Zero fanfic can also be involved in crossovers. For instance, he might be paired with characters from other Fate series or even from different fictional universes altogether. This can lead to really unique and exciting storylines, as the different powers and personalities interact in unexpected ways.
One common theme is power. Archer has great power, and fanfics often explore how he uses it, whether for good or for bad. Another theme is loyalty. His loyalty to his ideals or his master can be a central point in the stories.
Perhaps the family is kidnapped by an evil wizard. The archer embarks on a dangerous journey to the wizard's lair. Along the way, he overcomes various obstacles with his wits and archery. Once there, he battles the wizard and manages to rescue his family.
In this fanfic, the plot could center around the son being a bridge between two very different worlds. Archer's world might be full of different kinds of combat and Cheryl could bring in some emotional or cultural elements. In the Naruto world, he could be using his unique heritage to change the way ninjas think about combat or relationships. For example, he might introduce new combat techniques inspired by Archer, while also using Cheryl's wisdom to resolve conflicts in the village. His story could be one of self - discovery, where he tries to understand who he is in relation to his two very different parents and the world he lives in.
Character exploration is a key element. Fanfics often dig deeper into Archer's personality, his past as a hero, and his views on the Holy Grail War. For example, how his experiences shape his actions and decisions during the war.
The plot could be centered around a mysterious magical anomaly that Artoria can't handle alone. So she summons Archer Emiya. They then embark on a journey to figure out the source of the anomaly. During this journey, they face many challenges that test their skills and their relationship. Eventually, they succeed in solving the mystery and in the process, become closer as comrades.
The plot could be centered around a mysterious quest. Arthuria summons Archer Emiya to help her find a powerful relic that has been lost for centuries. Along the way, they face various foes who also seek the relic. Emiya's ranged combat skills and Arthuria's leadership and swordsmanship complement each other, allowing them to progress through the challenges.
One great Archer Arturia Fate Night fanfic is 'The Bonds Beyond Time'. It delves deep into the relationship between Archer and Arturia. It shows how their fates are intertwined in different timelines. The story is filled with action-packed battles and emotional moments. The author's writing style is really engaging, making it a must - read for Fate Night fans.
One possible plot could be about a character whose life is dull and monochrome until they discover a magical object that brings colour into their world. This object also comes with a 'fate' - a mission they must fulfill. As they embark on this journey, they meet various characters who help or hinder them, all while the world around them transforms with new and vivid colours.