An astrophysicist and media personality who translates scientific information into accessible narratives for the public. His role expands from communication to reluctant leadership during critical events.

A figure marked by survival-driven pragmatism, often misunderstood due to her shocking yet logical decisions. Her perspective is filtered through others' views, reinforcing her complex role in the story.

A Moiran surveyor whose personal journey highlights adaptability and the legacy of genetic foresight. Her development reflects broader themes of psychological resilience and historical awareness.

A Dinan known for his cultural heritage and leadership instinct. Ty's existential reflections on humanity's purpose add depth to his character.

A group of seven females who become genetic ancestors of humanity's future. They represent distinct traits and decisions shaping the survival and continuity of their descendants.

A representative council of descendants from the Seven Eves, tasked with a mission to Earth's surface. Their composition evolves, emphasizing cooperation and diversity across surviving lineages.

Three distinct groups emerging post-catastrophe: Spacers engineered for space, Diggers rooted in Earth's legacy, and Pingers adapted to oceanic life. Each embodies unique survival strategies and cultural identities.

Originally the spacecraft from which the Spacers descend, with Blue evolving into a faction valuing caution and community reliance. Their philosophy emphasizes stability in contrast to Red's experimental tendencies.

Offshoots of arklets emphasizing survival through technological experimentation and genetic modifications. The Red faction is known for its aggressive and innovative approach, standing in ideological contrast to Blue.