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.
His abilities would be a game - changer. His strategic mind could outwit many of the other Masters. His use of modern weapons combined with his Servant's powers would be a deadly combination.
If Naruto is summoned in the Holy Grail War fanfic, he would bring his unique ninja skills. His shadow clone jutsu could be used to confuse opponents and gather information. Also, his Rasengan could be a powerful offensive move against other Servants. He might have a hard time understanding the rules at first, but his determination would make him adapt quickly.
Well, Naruto's powerful jutsu and combat skills would make him a formidable Servant. He could use his Shadow Clone Jutsu to confuse his opponents and then hit them with a Rasengan. His strong will and determination would also play a big role in the battles of the Holy Grail War.
The plot could involve Emiya's discovery of secrets within the Grail War. He might find out that the Grail has been corrupted in ways not known in the original story. This could lead him on a quest to either purify the Grail or stop the war altogether. Also, his relationship with other Servants like Saber could be different. Instead of the typical rivalry, they could develop a mutual respect and a friendship that transcends the war. Emiya might also use his unique skills and abilities in new and creative ways. He could combine his projection magic with some other power he discovers during the war to gain an edge against his opponents.
A fanfic like this might start with Shiki's sudden summoning. He'd be confused at first, but then quickly adapt. His skills in combat, especially his ability to see the 'lines of death' on his opponents, would make him a formidable Master. He could encounter Servants from different mythologies and have to use his wits as much as his powers to survive in the war. For example, he might face a Servant with powerful magic and have to find a way to counter it using his unique perception.
In this fanfic, Emiya might be more assertive. In the original, he is often reserved and follows his own code quietly. But here, perhaps the circumstances of the 4th Grail War force him to be more outspoken and take more initiative. He could be more open about his feelings and motives, which is different from his rather mysterious nature in the original. For example, he might directly tell other Servants his thoughts on the Grail War instead of keeping them to himself.
His jutsu could be seen as a form of magic in the Grail War context. For example, the Rasengan might be like a powerful magical attack. His ability to sense chakra could be adapted to sense magical energy. And his Sage Mode would give him enhanced physical and magical capabilities.
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.
One interesting plot point could be Shiki's internal struggle. He has his own moral code which might conflict with the cut - throat nature of the Grail War. Another could be his relationship with his Servant. If he summons a Servant with a strong personality, there would be clashes and also moments of mutual understanding. For example, if he summons a heroic - type Servant who values honor, and Shiki has his own way of doing things.
It could develop Archer's character by showing his internal conflict. He might be reluctant to follow Kiritsugu's orders at first, but as he sees the bigger picture, he starts to cooperate more. For Saber, it could show her growth from a somewhat rigid king to someone who can adapt to modern times. Emiya's character could be developed through his interactions with the others, perhaps learning new skills or ways of thinking from Archer and Saber.