Ember Lumen

Leah Lewis

Wade (voice)

Mamoudou Athie

Bernie Lumen

Ronnie del Carmen

Gale (voice)

Wendi McLendon-Covey

Cinder Lumen

Shila Ommi

Brook (voice)

Catherine O'Hara

Clod

Mason Wertheimer

Fern Grouchwood

Joe Pera

Harold (voice)

Ronobir Lahiri

Alan / Lutz / Earth Pruner (voice)

Matthew Yang King

Marco and Polo Ripple

Innocent Ekakitie

Flarrietta (voice)

Wilma Bonet

Little Kid Ember (voice)

Clara Lin Ding

Big Kid Ember (voice)

Reagan To

Sparkler Customer (voice)

Jeff Lapensee

Wood Immigration Official (voice)

Ben Morris

Flarry (voice)

Jonathan Adams

Customer / Delivery Person / Earth Landlord (voice)

Alex Kapp

Doorman (voice)

P.L. Brown