Monstrum

Kim Myung-min

Yun-gyeom

Kim In-kwon

Seong-han / Mulgoe (voice)

Lee Hye-ri

Myeong-i

Choi Woo-shik

Royal Court Officer Heo

Lee Kyung-young

Sim-un

Park Hee-soon

King Jung-jong

Park Sung-woong

Jin-yong

Lee Do-gyeong

Grandpa Song

Lee Kyu-bok

Mo-gae

Kim Joong-hee

Mak-gae

Kim Kang-il

First Vice-Premier

Cho Won-hee

Second Vice-Premier

Jang Yong-bok

Court Minister

Yun Hui-su

Kang-nyeo

Han So-yeong

Myeong-i's Mom

Joo Ye-rim

Young Myung

Kang Tae-young

In Duk

Hong Ji-yoon

Mother

Kim Joon-bum

Government Official

Yoon Byung-hee

Eunuch

Baek Seung-chul

Peddlers Group Leader

Kim Kyu-baek

Peddler

Yoo Byung-sun

Peddler

Sung Min-Soo

Merchant