Essun's daughter and the secondary protagonist, Nassun is a young orogene with significant power who has endured her own share of challenges. Her journey offers a complex perspective on her relationships and the world around her.

A former Guardian whose story deepens in this novel, Schaffa grapples with his past actions and the consequences of his survival. His interactions with Nassun introduce questions about his motivations and capacity for change.

The headwoman of Castrima, Ykka is a strong, pragmatic leader managing a community of both humans and orogenes. Her leadership style and openness to collaboration present challenges and opportunities for Essun.

Essun's husband and father to Nassun and Uche, Jija harbors a deep-seated hostility towards orogenes. His actions initiate major events in the series, revealing complex family dynamics and personal conflicts.

An incredibly powerful orogene and former partner of Essun, Alabaster is largely bedridden due to his condition but remains influential. He provides critical information and training, guiding Essun as she navigates new revelations.

A stone eater and the narrative voice of the series, Hoa is deeply tied to Essun and possesses considerable power. His mysterious background unfolds as he supports and protects Essun throughout the story.