A retired Army surgeon and Easton’s close friend, Denton is shaped by their shared history and calls Easton to help investigate a disturbance at a mine.

An American chemist with a Boston accent, Ingold is Denton’s romantic partner and approaches the unknown through scientific curiosity and analysis.

A part of the Wholeness—a sentient life form—Fragment communicates with humans and seeks reconnection after being isolated due to a mining explosion.

Separated from the Wholeness, Thunder is an isolated and antagonistic entity that uses violence for self-preservation.

An illiterate assistant who works at the mine, facing social isolation and transitioning toward autonomy upon encountering the group.

Easton’s loyal batman, providing practical assistance and protection through a longstanding, supportive relationship.

Denton’s assistant who manages the group's campsite and supports stability, watching over Denton’s well-being.