* Merlin: A powerful wizard who guides and protects Wart. He is also the mentor of King Arthur.
* Kay: The son of Sir Ector and Wart's foster brother. He is a brave and skilled knight, but he is also arrogant and selfish.
* Sir Ector: The foster father of Wart and Kay. He is a kind and wise knight who teaches Wart about chivalry and honor.
* Sir Grummore: A giant who lives in the forest near Wart's home. He is a fierce warrior, but he is also gentle and kind.
* Madam Mim: A wicked witch who tries to stop Wart from becoming king. She is defeated by Wart with the help of Merlin.