One common theme is the struggle between good and evil within himself. Another is redemption, as he tries to atone for his dark actions. Power and its corrupting influence is also a frequent theme.
In some fanfictions, Shirou might have the power to instantly analyze game strategies. For example, he could quickly break down the mechanics of a complex RPG battle system and come up with the most effective way to win. This gives him an edge in in - game challenges.
One common theme is the power of their bond. Whether it's facing a common enemy or just dealing with the challenges of their world, their relationship is central. Another theme could be self - discovery, as they often learn more about themselves through their interactions.
Yes, there are some really interesting ones. You can find them on various fanfiction websites. Some focus on their adventures together in a fantasy world, where Shirou's skills and Lorelei's unique abilities combine to face challenges.
A possible plot twist could be that the dragon is actually a shapeshifter and turns into a human form that Shirou knows. Maybe it's someone he thought was dead.
The dark mages of that time could be antagonists. They might sense Shirou's different magical energy and try to either control him or destroy him. Also, there could be traitors within Arthoria's court who don't like the idea of an outsider like Shirou being around and causing changes, so they work against him.
One plot idea could be Dark Shirou in a post - apocalyptic world where he uses his skills to survive and rule a small territory. Another could be his journey to find a way to reverse his dark transformation. Or a plot where he has to face his darker self in a psychological battle within his own mind.
Often, Shirou's gamer powers are the key to resolving major conflicts. In a fanfiction where the world is on the verge of destruction due to a magical glitch, his ability to manipulate game - like magic systems (as part of his gamer powers) might be the only way to fix the problem. His journey to master and use these powers then becomes the central plot of the story.