The exploration of identity is also common. Merlin may question who he is while being a slave. Is he still the same person with the same destiny? How does being a slave change his view of himself and his role in Camelot? These are the kinds of questions that are often explored in such fanfictions.
One common theme is redemption. Morgana, in the role of a slave, often has a chance at redemption through her relationship with Merlin. Another theme is power struggle. Since Morgana has been in a position of power before, her new status as a slave creates an interesting power dynamic with Merlin.
Well, power and control are major themes. Morgana's control over Merlin as a slave sets up a situation where power is constantly being negotiated. Also, themes of redemption can be present. Maybe Morgana realizes the wrongness of her actions and tries to make amends. And there's often a theme of secrecy too. Merlin might have to keep his true self and his magic a secret while being a slave, which adds to the tension.
There could be a theme of social hierarchy. In a world like that of Merlin, there are clear hierarchies, and having Morgan as a slave would really highlight the differences in status. Also, a theme of friendship or loyalty could emerge. For example, how Merlin might react to Morgan's situation and whether their relationship would be affected by this new dynamic. It could also explore the theme of identity. Morgan's identity as a slave might conflict with her true self or her potential in the story.
One big theme is the exploration of magic. In many Merlin female fanfictions, the female characters are either learning magic, or have a special connection to magic that is different from the male characters. For instance, a female character might have a more intuitive approach to magic. Also, the theme of friendship is present. A female character could form a strong friendship with Merlin or other characters like Guinevere, and this friendship is crucial in their adventures.
Power and responsibility are common themes. As Merlin becomes king, he has to handle the power he's gained while being responsible for his kingdom. Another theme is magic and its role in ruling. Since Merlin is a powerful sorcerer, fanfictions often explore how his magic affects his kingship, whether it's for protection or for the betterment of the kingdom.
One common theme is the loss of hope. As Camelot collapses, the characters often struggle with losing their faith in the future. Another theme is the test of loyalty. Friends may turn against each other in the face of chaos.
Another theme is the empowerment of female characters. In these fanfictions, the female characters usually break free from the traditional roles and show great strength and independence, especially in the context of their relationships.
A prevalent theme is the exploration of magic itself. How the magic in the Harry Potter universe and that in the Merlin universe are related or different. Also, destiny plays a role. Fanfictions often explore how their destinies are intertwined, whether it was meant to be that they meet and change the course of events in both their worlds.
One of the main themes is the conflict between Merlin's secret magic and the public perception in the royal court. There's also the theme of destiny. Merlin is often seen as having a great destiny in relation to the royalty. And love, whether it be platonic or romantic between Merlin and the royal characters, is a frequent theme. For example, in many fanfictions, Merlin forms a deep bond of friendship with Arthur that is almost like a brotherly love. His loyalty to Arthur and the kingdom is constantly tested by his need to hide his magic.
Magic is a very common theme. Since it's about Merlin's ritual, magic is at the core. It often shows how powerful Merlin's magic was through the ritual.