The Captain of the Guard and a loyal servant to the King of Adarlan, known for his handsome looks and internal conflict between his duties and growing feelings for Celaena. His sense of loyalty often causes tension in his personal relationships.

The crowned Prince of Adarlan with blue eyes and a boyish grin, a friend to Celaena and Chaol. He grapples with his own magical abilities and his disillusionment with his father's rule.

A compassionate and dedicated crowned Princess of Eyllwe, serving as both an ally and a guiding force for Celaena. She remains in the glass castle to spy on the king in hopes of freeing her oppressed people.

A handsome and manipulative courtesan who serves as the story’s primary antagonist. His charisma and cunning mask a ruthless nature focused on achieving his own ends.

An unnamed, powerful ruler who has outlawed magic and controls his kingdom with fear. He is characterized by his need for power and presents a constant oppressive presence over the protagonists.

The king’s nephew and Dorian’s cousin, known for his arrogance and spoiled demeanor. He is initially introduced as a potential antagonist but later largely disappears from the main action.