Alienoid

Ryu Jun-yeol

Muruk

Kim Woo-bin

Guard / Thunder

Kim Tae-ri

Ean

So Ji-sub

Moon Do-seok

Yum Jung-ah

Madam Black

Jo Woo-jin

Mr. Blue

Kim Eui-sung

Jajang / Doctor

Lee Hanee

Min Gaelin

Shin Jung-keun

Right Paw

Lee Si-hoon

Left Paw

Kim Dae-myung

Thunder (voice)

Choi Yu-ri

Young Ean

Kim Ki-cheon

Dog Turd

Yoon Byung-hee

Shaman Dosa / Alien Robot (voice)

Ji Gun-woo

Murderer

Yoon Kyung-ho

Sam-sik

Ok Ja-yeon

Fellow Doctor

Lee Hyun-gul

Shaman Dosa 2

Kim Hae-sook

Secret Temple Old Lady

Yoo Jae-myung

Master Hyun

Jeon Yeo-bin

Hong Eon-nyeon

Kim Min-seo

Min-sun

Kim Min-joon

Young Muruk

Lee Sun-hee

Mist-Shrouded Inn Owner