Monstrum

Kim Myung-min

As Yun-gyeom

Kim In-kwon

As Seong-han / Mulgoe (voice)

Lee Hye-ri

As Myeong-i

Choi Woo-shik

As Royal Court Officer Heo

Lee Kyung-young

As Sim-un

Park Hee-soon

As King Jung-jong

Park Sung-woong

As Jin-yong

Lee Do-gyeong

As Grandpa Song

Lee Kyu-bok

As Mo-gae

Kim Joong-hee

As Mak-gae

Kim Kang-il

As First Vice-Premier

Cho Won-hee

As Second Vice-Premier

Jang Yong-bok

As Court Minister

Yun Hui-su

As Kang-nyeo

Han So-yeong

As Myeong-i's Mom

Joo Ye-rim

As Young Myung

Kang Tae-young

As In Duk

Hong Ji-yoon

As Mother

Kim Joon-bum

As Government Official

Yoon Byung-hee

As Eunuch

Baek Seung-chul

As Peddlers Group Leader

Kim Kyu-baek

As Peddler

Yoo Byung-sun

As Peddler

Sung Min-Soo

As Merchant

Ju Seo-eun

As Search Party Wife

Chu Yeon-gyu

As Search Party Member

Kim Joon-bum

As Fighter

Son In-yong

As Forced Conscripted Citizen

Kim Min-seok

As

Lee Chan-yu

As Kid

Mo Jeong-min

As Old Man with Backpack