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
Isaac McKee
Young Simon
?
Roman Parsons Crow
Child of Eden