An astrophysicist in his seventies who isolates at an Arctic observatory after opting to stay behind amidst an evacuation. He becomes accompanied by an enigmatic child named Iris.

A mysterious young girl whom Augie finds and cares for at the observatory, becoming a central figure in his journey of self-discovery and redemption.

Captain of the Aether and a romantic interest for Sully, who works to maintain morale among the crew during the mission's challenges.

A crewmember responsible for repairs and maintenance on the Aether; she handles the silence from Earth with difficulty, ultimately focusing intensely on her tasks.

An Aether crewmember who immerses himself in video games as a way to cope with the lack of communication from Earth and maintain his connection with family.

A scientist aboard the Aether who counters the silence of Earth by engrossing himself in work and displaying a detached demeanor from the rest of the crew.