The combination of Naruto and Irisviel in a harem setting is quite unique. Naruto is from a world of ninjas with his own set of values and powers, while Irisviel is from a different fictional universe with her own charm. In a harem fanfic, it allows for an interesting blend of different cultures and power systems. It can create new and unexpected storylines.
Well, there might be some out there. You can try looking on fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'naruto irisviel harem' and you might find some interesting reads. However, the quality can vary greatly from one story to another.
Another idea is that Kiritsugu summons Shirou because he foresees a future threat that only Shirou can prevent. This could involve time - traveling elements. Shirou might have to go back in time to change certain events. During this process, he and Kiritsugu would have to work together to figure out how to manipulate time without causing major disruptions.
One common theme is redemption. Given Kiritsugu's complex past, many fanfics explore his journey towards redeeming himself in the context of the Beast Lair.
One common theme is the clash of different moral codes. Kiritsugu has his own set of beliefs, and when he is crossed over into other worlds, like a world of superheroes or a magical realm, his way of thinking often clashes with the local characters. For example, in a crossover with a world of knights, his willingness to use underhanded tactics for the greater good might be at odds with the knights' chivalry.
One great kiritsugu emiya crossover fanfiction is 'Kiritsugu in the World of Harry Potter'. It imagines Kiritsugu being summoned to the wizarding world. His skills and unique moral code create really interesting interactions with the characters there. Another one could be 'Kiritsugu and the Avengers Crossover'. Here, he teams up with the Avengers and his strategic mind helps them in battles in a very different way compared to their usual approach.
In such a fanfic, it could focus on the battles they fight together. With Archer's long - range capabilities, Emiya's versatility, and Saber's powerful swordsmanship, they could be an unbeatable team. Kiritsugu might be the strategist behind their every move. The story could also delve into their pasts. Saber's past as a king, Archer's as a hero, and how those pasts influence their actions in the present. It could be a really exciting story full of action and drama.
Well, in such a fanfic, Kiritsugu might summon Shirou for a crucial mission. Maybe there's a powerful enemy that only Shirou can defeat with his unique abilities. It could also be that Kiritsugu summons Shirou to pass on some important knowledge or skills. Or perhaps it's a situation where Shirou is the key to saving a particular world or timeline that Kiritsugu is involved in.
Archer is often well - written in these fanfictions. His complex personality and his own set of values can create a lot of interesting interactions, especially when paired with Kiritsugu.
One possible plotline could be Archer and Kiritsugu teaming up to face a powerful common enemy. They might combine their different skills and strategies to overcome challenges.