Well, it could start with a chance encounter. Maybe you're in a magical forest and Arthur Pendragon rides by on his horse. Your eyes meet and there's an instant spark. It's like something out of a fairy tale.
One challenge could be the difference in your status. Arthur is a king or a great leader, and you might be an ordinary person. Society's expectations could put pressure on your relationship.
The theme of loyalty could also be prominent. Arthur's loyalty to his kingdom and his knights might be tested against his loyalty to his love. He has to decide whether he will stand by his love in the face of opposition from his court or if he will side with his traditional allies and duties.
It's hard to say. Maybe it depends on your experiences and feelings. If you think there is, then there could be!
One key element is the concept of courtly love. Arthur, as a king, was expected to show a certain refined and chaste form of love towards his queen, Guinevere. Another element is the conflict that love can bring. In his case, the conflict with Lancelot over Guinevere was a major part. Also, loyalty plays a role. Arthur's loyalty to his love and his kingdom were constantly being tested.
Saber from Fate/Stay Night would be an obvious choice. Since she is also related to the Arthurian legend, there could be a lot of interesting interactions between them. They could compare their experiences as king, or even fight side by side against a common enemy.
In Arthur Pendragon's love story, his love for Guinevere was deep. He chose her as his queen, seeing in her not only beauty but also a certain grace and charm. However, the presence of Lancelot, one of his most trusted knights, complicated things. Lancelot and Guinevere's love for each other grew, and when their affair was discovered, it sent shockwaves through Camelot. Arthur was faced with the difficult choice between his love for Guinevere and his loyalty to his kingdom and knights. This story shows how love can be both a powerful and a destructive force in the Arthurian world.
Arthur Pendragon might fall in love with a noblewoman from a neighboring kingdom. Their kingdoms have a long - standing alliance. They meet at a grand ball held to strengthen the bond between the two lands. Arthur is immediately drawn to her grace and intelligence. They start writing letters to each other when she returns to her kingdom. Their love blossoms through these letters, but political intrigues and power - hungry lords try to break their relationship apart as they fear the united front of the two kingdoms through their love.
To create a good Arthur Pendragon OC fanfic, you need to pay attention to the writing style. Use descriptive language to bring the world of Camelot to life. Describe the castle, the forests, and the people. When writing the interactions between the OC and Arthur, show rather than tell. Let the readers feel the tension, the friendship, or the conflict through their actions and dialogues. And don't forget to have a good pacing. Don't rush through important moments but also don't drag out the story unnecessarily.
Maybe someone who is very creative and looks at the broad concept of magic in both. They could see the heroic aspects of Harry Potter and compare them to Arthur Pendragon's heroism. But really, it's a stretch. Harry Potter has a very different set of rules for magic and a different kind of society compared to the Arthurian world.
One possible reason could be a misunderstanding. Maybe Merlin did something that Arthur misinterpreted as betrayal or dishonesty. For example, if Merlin was secretly helping an enemy for a greater good that Arthur wasn't aware of at the time.