Iron Lung

Mark Fischbach

Simon

Caroline Kaplan

Ava

Troy Baker

David

Elsie Lovelock

SM-8 Research Lead / The Speaker (voice)

Elle LaMont

SM-8 Research Assistant / The Whisper (voice)

Mick Lauer

The Guy Who Told You to Cross the Wires (voice)

Dave Pettitt

The Father

Holt Boggs

Eden Soldier