As one of the main protagonists and the king, Edward deals with his illness while showcasing a humorous and grumpy teenage attitude. His character explores themes of freedom and power.

G is a protagonist who prefers poetry and struggles with familial expectations, feeling like an outsider due to his horse form. He is sensitive and seeks to find his true self and place in the world.

A major antagonist who was Edward's advisor, Dudley is a power-hungry character whose greed leads to violent instability in the country. He is also a personal antagonist to Gifford, whom he manipulates and criticizes.

A clever ally to the protagonists who helps ensure their success, Bess is a supportive character with strong tactical skills. Her relationship with Edward showcases her leadership abilities.

Mary is an antagonist motivated by beliefs in social order, showcasing a sweet but ultimately ruthless demeanor. Her character represents the threat of political turmoil and social biases.

Gracie supports Edward with her bravery and self-sufficiency. She challenges gender norms and contributes to Edward's growth while maintaining her independence.

As the grandmother of key characters, Gran provides refuge and support to the protagonists. She defies convention and offers acceptance regardless of their transformations.

Peter, the stable-master, and Pet, an animal with unexpected abilities, remain loyal to the monarchy. They assist the protagonists in their journey, balancing the betrayal of other servants.