The theme of sacrifice also often appears. Shirou is known for his self - sacrificing nature, and in fanfics, this can be explored further in relation to Saber. For instance, how his willingness to sacrifice himself affects Saber and how she might respond to it, either trying to prevent it or being inspired by it.
One common theme is love. Their relationship is often explored in different ways, from a slow - burn romance to an instant connection. Another theme is loyalty. They are both loyal characters, and in fanfiction, this loyalty is often tested and reaffirmed.
The idea of sacrifice also pops up a lot. Given the nature of the Fate series, the characters may be in situations where they have to sacrifice for one another. In fanfics, this can be explored in different ways, like Saber sacrificing her power to protect Rin and Shirou.
Another theme is the struggle against fate. In many fanfics, Saber Alter and Shirou find themselves having to fight against the pre - determined path set by the original 'Fate' storyline. They try to create their own future together, which makes for an exciting and engaging read.
One common theme is sacrifice. Shirou is often willing to sacrifice himself for Saber, and vice versa. It shows the depth of their love.
Growth is also a prevalent theme. Both characters grow as individuals within their marriage. Shirou might become more confident and assertive, while Saber may learn to be more open and emotional. This is often shown through various events in their married life in the fanfiction, like dealing with financial issues or making big decisions together.
Love and devotion are very common. Since their relationship in the original work is so complex and deep, fanfics often explore how their love for each other can overcome different obstacles.
Another theme could be redemption. Maybe Shirou as a Dead Apostle is seeking redemption through his relationship with Saber. And Saber might be trying to save him from his dark path. It's also common to see themes of forbidden love, as their natures seem so different that their relationship might be seen as something not allowed in the normal Fate world order.
Love is a very common theme. Their relationship, which was complex in the original work, is often explored more deeply in fanfiction, showing different aspects of their love for each other.
One common theme is the exploration of different relationships. Since it's a harem concept, there are multiple love interests for Shirou, and the fanfics often focus on how he navigates these relationships, whether it's through friendship first or instant attraction.
The theme of redemption also pops up a lot. Shirou might have made mistakes in the past, and fanfics will show him trying to make up for those. Additionally, the exploration of his relationships, whether it's romantic or platonic, is a common theme. For example, his relationship with Saber is often a focal point in many fanfics.