Don Lee

Ba-woo

Seohyun

Sharon

David Lee

Kim Gun

Kyung Soo-jin

Jung-won

Jung Zi-so

Eun-seo

Choi Gwang-il

Father Marco

Song Yo-sep

Middle-Aged Man

Park Ock-chool

Auntie

Han Gi-joong

Chief of Police

Lee Da-il

Mysterious Man

Jo Hye-yeon

Female Guest

Yoon Ji-won

Su-jin

Jeon Se-won

Female Patient

Nam Mi-jung

Landlady

Park Ki-seon

Landlord

Cha Woo-jin

CCTV Security Guy

Kim So-yang

CCTV Security Girl

Kim Do-gun

Delivery Driver

Seo Mun-ho

Male Nurse 1

Lee Seon-ho

Male Nurse 2

Lee Sung-woo

Basement Demon 1

Lee Jae-suk

Basement Demon 2

Carla Fernanda Avila Escobedo

Hideout Informant

Lee Tae-young

Thumbs-Up Guy

Lee So-yoon

Orphanage Child 1

Kim Si-woo

Orphanage Child 2

Kim Woo-bin

Orphanage Child 3

Jeong Ha-bin

Orphanage Child 4 / Additional Children Voices 4 (voice)

Jang Woo-joon

Orphanage Child 5

Lim Yong-soon

Pastor

Na Gyeong-cheol

Male Announcer (voice)

Lee Seung-min

Female Announcer 1 (voice)

Kim Seon-yeong

Female Announcer 2 (voice)

Lee Si-hyeong

Hospital Security Guard

Lee Won-haeng

Hospital Patient 1 / Hallway Worshipper 1

Jeong Yoon-seong

Hospital Patient 2

Ryu Seong-cheol

Hospital Patient 3

Noh Jae-hoon

Hospital Patient 4

Kim Ji-yeong

Hospital Patient 5

Kim San-seong

Hospital Patient 6

Choi Hong-rak

Hospital Patient 7

Jeong Kyeong-sook

Sister Angela

Lee Jae-yi

Young Ba-woo

Kim Ye-gyeom

Young Joseph

Lee Seol-i

Young Sister Catalina

Kim Seong-dong

Young Father Marco

Mitch Craig

Junkie 1

Lee Young-jun

Junkie 2

Ahn Hyo-hoon

Junkie 3

Hong Ji-woo

Junkie 4

Ri E

Junkie 5

Kim Gi-soo

Junkie 6

Seon Woo

Junkie 7

Im Seo-ah

Junkie 8

Lee Seo-kyeong

Junkie 9

Ha Yoo-ri

Junkie 10

Kim Jeong-gil

Junkie 11

Seon Seung-min

Junkie 12

Do Yoo-ri

Junkie 13

Lee Jeong-woo

Junkie 14

Kim Ji-seon

Junkie 15

Lee Ji-yeong

Junkie 16

Lee Dong-gyoo

Junkie 17

Yook Ye-joo

Junkie 18

Jo Jeong-bin

Junkie 19

Jo Yoo-jin

Junkie 20

Song Hee-joo

Junkie 21

Choi I-jae

Junkie 22

Lee Da-ryeong

Junkie 23

Lee Hyeon-jin

Junkie 24

Kwon Hye-won

Junkie 25

Song Ji-hoon

Junkie 26

Seo Woo-hee

Junkie 27

Park Eun-cheol

Junkie 28

Hwang Tae-hee

Junkie 29

Sin Ji-in

Mentally Ill Person / Possessed Person

Kim Soo-woo

Paramedic

Lee Geon-goo

Hideout Demon 1

Maeng Seung-yeong

Hideout Demon 2

Kwon Ji-hoon

Hideout Worshipper 1

Kim Seok-jin

Hideout Worshipper 2

Park Geon-hee

Hideout Worshipper 3

Jo Seung-yeon

Hideout Worshipper 4

Hwang Yeong-yoon

Hideout Worshipper 5

Yoon Gi-hyeon

Hideout Worshipper 6

Jeong Sin-yeong

Hideout Worshipper 7

Park Joo-won

Pathologist's Assistant / Basement Worshipper 4

Moon Kyeong-rin

Pathologist / Hallway Worshipper 3

Kim Jin-woo

Hallway Worshipper 2

Park Seung-jin

Hallway Worshipper 4

Kim Ye-seong

Hallway Worshipper 5 / Basement Worshipper 2

Min Seon-gi

Spying Worshipper

Ji Ryoon

Basement Worshipper 1

Kim Tae-yoon

Basement Worshipper 5

Kim Woo-ram

Basement Worshipper 6

Yoon Jin-yul

Chapel Worshipper 1

Hyeon Seung-hwan

Chapel Worshipper 2

Nandin-Erdene Boldbaatar

Chapel Worshipper 3 / Basement Worshipper 3

Park Hyeon-joon

Chapel Worshipper 4

Kim Do-hoon

Chapel Worshipper 5

Jeong Ah-joon

Chapel Worshipper 6

Yoo Seong-gon

Chapel Worshipper 7

Jo Chang-geun

Chapel Worshipper 8

Yang Nam-wook

Chapel Worshipper 9

Park Jong-min

Chapel Worshipper 10

Hwang Dae-hyeon

Joseph

Jo Hyeon-gyeom

Monstrous Entity (voice)

Kang Seong-wook

Eun-seo's Demon Form (voice)

Choi Jin-ho

Moloch (voice)

Kim Nam-hyeon

Additional Male Voices 1 (voice)

Hwang Sang-jo

Additional Male Voices 2 (voice)

Wang Hee-jeong

Additional Male Voices 3 (voice)

Yeom Seung-cheol

Additional Male Voices 4 (voice)

Ahn Jeong-ho

Additional Male Voices 5 (voice)

Moon Eun-ji

Additional Female Voices 1 (voice)

Park So-hyeon

Additional Female Voices 2 (voice)

Choi Jae-eun

Additional Female Voices 3 (voice)

Lee Jae-bin

Additional Children Voices 1 (voice)

Lee Joo-won

Additional Children Voices 2 (voice)

Song Jae-yoon

Additional Children Voices 3 (voice)

Ryu Seung-su

Detective Choi

Jeon Ik-ryoung

Sister Catalina