A significant theme is discovery. Shirou discovers new aspects of the world around him when wearing the dragon costume. It could be new magical elements or hidden places. Another theme that can be found is that of destiny. The fanfictions may imply that Shirou was meant to find and wear the dragon costume, and it's part of his greater destiny. This can add a sense of purpose and grandiosity to the story.
In many 'Shirou dragon costume fanfiction', the theme of transformation is prevalent. Not just physical transformation when he puts on the costume, but also a mental and emotional transformation. He may become more confident or more in touch with his inner self. Also, the theme of protection is common. Shirou usually uses the powers from the dragon costume to protect his loved ones or the world from threats. This often leads to heroic deeds and intense battles.
One common theme is power. When Shirou dons the dragon costume, he often gains new and extraordinary powers, and the story may revolve around how he masters them. Another theme is identity. The costume can sometimes make Shirou question who he is and how this new form affects his self - perception.
One common theme is power. Shirou often gains new powers or abilities through his connection with the dragon. Another is adventure, as they usually go on quests together.
A common theme is friendship. Often, Shirou and the dragon start off as strangers or even enemies, but gradually form a strong bond of friendship. Another theme is power. The dragon usually represents a great source of power, and Shirou may either gain some of that power or learn how to control it.
One common theme is power and its consequences. Shirou often gains new powers related to the dragon, and the fanfictions explore how he copes with that. Another theme is loyalty, whether it's Shirou's loyalty to his new dragon ally or vice versa.
Love is a very common theme. Their deep and often complex relationship is explored in many ways, from the budding of new love to the strengthening of an already existing bond.
One common theme is self - discovery. As Shirou delves into swordsmithing, he often discovers new things about himself. Another is the pursuit of perfection. Since swordsmithing requires precision, Shirou is often on a journey to create the perfect sword. And there's also the theme of legacy, as his swords can leave a lasting mark on the world or on those who wield them.
One common theme is the relationship between them, whether it's a budding romance or a deep friendship. Another theme is their participation in the Holy Grail War, with how they strategize and support each other during battles. Also, their different personalities - Shirou's selfless nature and Tohsaka's more calculating side - often lead to themes of conflict and resolution as they interact and learn from each other.
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.
A prevalent theme is the battle between his human morality and vampiric instincts. His previous moral code as a human might clash with the new, more primal urges of a vampire. This internal conflict can drive the plot forward in many vampire shirou fanfictions. Also, the idea of redemption or acceptance of his new state is also a common theme that runs through a lot of these stories.
Another theme is the adaptation of her character traits. A female Shirou may still hold onto the original Shirou's sense of justice, but it could be expressed in different ways. Maybe she is more empathetic as a female, which changes how she approaches helping others in the fanfiction.
Love is a very common theme. Their relationship, whether it's a budding romance or a deep, abiding love, is often explored. Another theme is heroism. Since both are heroic characters in their own right, their heroic deeds and how they support each other in that aspect is often written about.