Arthur, the protagonist's hero, is a powerful yet kind figure committed to establishing peace in Britain. Despite his controversial role as an exiled illegitimate son, his actions and leadership play a central role in the unfolding political landscape.

Merlin is a revered Druid striving to restore ancient pagan traditions in Britain. His mysterious nature and vast knowledge play a key role in influencing both Derfel and the broader course of events, though his presence is often enigmatic.

Guinevere is known for her charm and intelligence, captivating Arthur despite the political consequences of their relationship. While her role is initially minor in the narrative, her presence is pivotal in shaping the story's conflict and intrigue.