이 별에 필요한

김태리

Nan-young (voice)

홍경

Je-i (voice)

권영미

Rosa (voice)

강구한

Yun-jae (voice)

안영미

Ji-young (voice)

장미

Young Na-young / Detector (voice)

윤아영

Dia (voice)

최한

Manager (voice)

David J Robbins

Eugene / Jared (voice)

이명희

Director / Caregiver (voice)

김진수

Reporter (voice)

박성영

Researcher (voice)