Elle Fanning

Thia / Tessa

Dimitrius Schuster-Koloamatangi

Dek / Father

Ravi Narayan

Bud

Michael Homick

Kwei (Suit)

Stefan Grube

Kwei (voice)

Reuben De Jong

Father (Suit)

Cameron Brown

Drone Synth

Alison Wright

MU/TH/UR (voice)

Matt Duffer

Kwei's Ship Computer (voice)

Ross Duffer

Kwei's Ship Computer (voice)

Agung Bagus

Gero (uncredited)