Another plot idea could be focusing on the backstories of the secondary characters in 'zero no tsukaima' within the fanfic. For example, we could learn more about Siesta's life before she came to the academy. It could add more depth to the overall story world and create new sub - plots.
One idea could be to cross it with a modern - day world. Imagine Louise and Saito suddenly finding themselves in a bustling city. They would have to deal with technology they don't understand, like smartphones and cars. Another plot could involve a crossover with a magical school from another series. The characters could exchange magical knowledge and spells.
One possibility could be a world where the post - apocalyptic setting of Fallout meets the magic - filled world of Zero no Tsukaima. Maybe the main character from Fallout somehow gets transported to the Zero no Tsukaima world. They could bring with them their survival skills and unique technology, which would be very strange and new in the magical world. This could lead to all kinds of adventures, like trying to adapt to the different social and magical systems while also trying to find a way back home.
One interesting concept could be alternative timelines. Writers might explore what would happen if certain events in the original 'zero no tsukaima' series occurred differently. For example, if Louise had chosen a different familiar. Another concept could be character development beyond what was shown in the anime or manga. Maybe Saito becoming even more powerful in magic in ways not originally depicted. And also, exploring different relationships between the characters, like a deeper friendship between Louise and her classmates that was only hinted at in the original story.
Another theme is the exploration of virtual worlds. Since it's a 'gamer' fanfic, there could be scenarios where the characters enter a virtual world that has its own rules and challenges. This can lead to new character developments and interactions. For instance, Saito might have to navigate a virtual world full of strange creatures while still maintaining his relationship with Louise in this new setting.
Well, one possible plot could be that Louise from Zero no Tsukaima somehow gets transported to the Naruto world. Maybe she mistakes Naruto for a familiar at first. And Naruto, being his curious self, would be intrigued by Louise's magic. They could team up to fight against common enemies, like some rogue ninjas who are after Louise's magic or some dark forces in the Naruto world that see Louise as a threat.
The characters are a big draw. The relationship between Louise and Saito is full of twists and turns. Their growth throughout the story, especially Louise's development from a clumsy mage to a more confident one, makes the light novel engaging. Also, the world - building is quite detailed, with different kingdoms and their own cultures and politics that add depth to the overall story.
Louise is a very popular character to focus on. She has a complex personality, being proud yet often insecure. Her growth as a mage throughout the series can be further explored in a fanfic, especially her relationship with her magic and how it evolves.
One idea could be exploring Aloy's life before she became the Seeker. Maybe she had a secret friendship with another outcast in her tribe. Another plot could involve a new threat emerging that is related to the old world's technology but in a way Aloy has never seen before. And perhaps a story about Aloy trying to understand the true origin of the machines beyond what she already knows.
One idea could be exploring Prisoner Zero's backstory before being imprisoned. Maybe he was wrongly accused and the oc in the fanfic could be on a quest to prove his innocence.
Some fanfics might focus on the theme of self - discovery for Agnes. In the original work, she has her own character arc, but in fanfics, this can be expanded. She could be exploring her own abilities, her place in the world, and her true self. Additionally, the theme of mystery might be present. Fanfic writers could create new mysteries surrounding Agnes, such as her hidden past or undiscovered powers, to keep readers intrigued.