Arthur is an extremely important character. He's the central figure around whom much of the story revolves. Merlin is also important as he guides and mentors Arthur. Morgan le Fay is a key character too. She has her own motives and often creates challenges for Arthur.
One main theme is the concept of leadership. It shows different types of leadership through the characters. Another could be the struggle between good and evil as the story progresses. And also, the idea of destiny plays a role as the characters face various situations that seem to be leading them towards a pre - determined end.
One of the main themes is the concept of kingship. It shows different aspects of what it means to be a king, like leadership and responsibility. Another theme could be the cycle of life and death as seen through the characters' experiences.
Arthur is definitely one of the most interesting characters. His journey from being an unassuming boy to a king is full of twists and turns. Merlin is also very interesting. His magic and his role in guiding Arthur add a lot of mystery to the story.
The themes include the cycle of violence and the attempt to break it. Arthur tries to create a new order with the Knights of the Round Table to end the feudal and violent ways of the past. And the theme of love is there too, in different forms - love between friends, like Arthur and Merlin, and romantic love which also affects the characters' actions and decisions.
King Arthur is obviously a very important character. He is the central figure around whom the story revolves. Merlin is also crucial as he is Arthur's mentor, guiding him with his magic and wisdom. Then there are the Knights of the Round Table like Lancelot, who is known for his great skills in combat and his complex relationship with Arthur and Queen Guinevere.
One of the main themes is the concept of chivalry. It shows what it means to be a noble knight through the characters' actions and decisions. Another theme is power and leadership, as seen in Arthur's journey to become and be a king. Also, the novel explores the idea of fate and destiny, how Arthur is fated to be the once and future king.
Maybe there is a group of characters. One could be a brave warrior, another a clever strategist, and there could also be a mysterious figure whose identity is slowly uncovered throughout the story. Together, they form a team that has to deal with the challenges presented in the 'once and future graphic novel'.