Merlin is the main human character. The dragons, such as Aithusa, could be important characters. Aithusa, being a white dragon, might have a special role in the story. Additionally, Gaius could be a significant character. He might be worried about Merlin living with the dragons at first but then come to understand the importance of it. His wisdom could also play a part in guiding Merlin in his new life among the dragons.
Well, obviously Hiccup is one of the main characters. He is the one who has a special connection with the dragons.
One possible plot could be that Merlin discovers a hidden dragon lair where he is accepted as one of their own. He learns dragon magic and uses it to protect Camelot in ways he couldn't before. Maybe he even rides the dragons into battle against powerful dark forces.
Arthur could visit Merlin in the tower. He might be curious about what Merlin does in his secret place or he could be in need of Merlin's help and follows him there.
Obviously, Merlin is the main character. As a prince, he has a central role in the story. Arthur is also often a major character. Their relationship changes and develops in different ways. For example, Arthur may have to deal with Merlin being his equal in status now. Gwen might also be an important character, perhaps as Merlin's ally or love interest.
Obviously, Merlin is one of the main characters. He is the powerful wizard with a kind heart, always trying to protect Camelot.
Well, obviously Merlin and the prince are the main characters. Merlin is often depicted as a powerful wizard with a kind heart, and the prince can vary in personality depending on how the author writes him. Sometimes he's brave and headstrong, other times more cautious and diplomatic.
The main characters are obviously Lamia and Merlin. Lamia is often depicted as a unique and mysterious character with her own set of powers and abilities. She might have a connection to the more shadowy or less - known aspects of magic.
In 'Balinor Merlin' fanfiction, the two central characters are Merlin, who is constantly trying to protect Camelot and Arthur, and Balinor. Balinor is important as he is not only a dragonlord but also has a connection to Merlin. He passes on his knowledge and power to Merlin, which makes their relationship a key part of the fanfiction. Their interactions, the things they learn from each other, are what drive the stories in most of these fanfictions.
Obviously, Harry and Merlin are the main characters. Harry, the young wizard from Hogwarts, and Merlin, the legendary wizard from the past.
I don't know for sure as I haven't read it. But it could include Merlin, Arthur, and perhaps a new character who is the 'heart thief'.