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.
Another interesting 'beast lair kiritsugu fanfic' might be 'The Mystery of Kiritsugu in Beast Lair'. This fanfic delves into the mystery surrounding Kiritsugu's presence in the Beast Lair. It has a lot of suspense and intrigue as the author slowly reveals the secrets related to his character in this strange setting.
In a fanfic where Kiritsugu is summoned in the 5th Grail War, he would bring his own set of skills and motives. His skills as an assassin would come in handy. He might try to figure out the true nature of the Grail this time around, especially after his experiences in the previous wars. His relationship with other Servants could be complex. Some might respect him for his past achievements, while others might see him as a threat. And his actions would likely be guided by his own moral code, which, although not entirely conventional, has its own logic.