At 15 years old, she is the diligent and cheerful daughter of the Maheu family who works in the mine and has a developing affection for Étienne.

Maheu’s determined wife, who uses her resourcefulness to care for her family despite their poverty and is wary of rebellion.

A hard-working miner who is initially accepting of his low pay and status but grows interested in Étienne's discussions of revolt.

A young miner filled with animosity towards Étienne, he is possessive of and abusive towards Catherine.

The aging father of Toussaint Maheu, who shares with Étienne the family’s history in the mines and exhibits deeply ingrained obedience and resentment towards the Company.

The mine engineer, known for his authority and flirtations, who exhibits a complex mix of discipline with workers and sympathy for their plight.

A former miner turned public house owner, who provides a platform for miners’ discussions but prefers a pragmatic approach to rebellion.

A mine shareholder who lives comfortably with his wealth and lacks understanding of the miners’ struggles, believing firmly in the social hierarchy.

The indulged daughter of the Grégoires, she represents a sheltered life untouched by hardship and is doted upon by her parents.

A Russian mechanic and anarchist with a radical approach, advocating for violent change, and often consulting with Étienne.

The passive manager of the mine who is caught between the demands of the Company and the struggles of the miners, while dealing with personal issues at home.

An 18-year-old miner known for her bold personality and promiscuity, yet displays genuine kindness and depth of character.