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.
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 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.
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.
You could include characters like Harry Potter. His knowledge of magic from the Hogwarts world would contrast and interact interestingly with Louise's magic from 'zero no tsukaima'. Another good character could be Naruto. His determination and unique ninja skills would add a different dynamic to the story when combined with Saito's swordsmanship.
One idea could be to cross Megaman Zero with another popular game series like Sonic. Imagine Zero running at high speeds through the colorful zones in Sonic's world. Another idea is to cross him with a Final Fantasy world. Zero could be a mysterious warrior in that RPG setting, using his skills to fight against the powerful summons and magic - users there. Also, a crossover with the Metroid series would be cool. Zero exploring the desolate planets and facing off against the space - pirates and Metroids could make for an exciting fanfic.
There's 'Zero's New Adventure in a Crossover'. In this fanfiction, Louise and her familiar Saito find themselves in a crossover situation with a post - apocalyptic world. They have to use their magic and sword - fighting skills to survive and find a way back home. It's full of action and some really interesting character interactions.
Another plot could involve Ultraman Zero crossing over to a post - apocalyptic Earth. He finds a group of survivors who are fighting against mutated monsters. Zero has to use his powers not only to defeat the monsters but also to help the survivors rebuild their society, teaching them about hope and perseverance.
Perhaps in the fanfiction, Zero and Kiryu both get cursed by an ancient magic. The curse gives them some of each other's traits while also weakening their own original powers. This forces them to rely on each other more than ever. They go on a quest to find the source of the curse and reverse it. Along the way, they learn about each other's pasts, values, and what really drives them, leading to a deep friendship or respect for one another.
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.
Well, one unique feature is the combination of different fictional elements. For example, it might bring in characters or concepts from other fantasy or sci - fi worlds. This creates a whole new and exciting story universe.