Lee Byung-hun

Yu-baek / Duk-gi

Acting

Jeon Do-yeon

Sul-rang / Wol-so

Acting

Kim Go-eun

Hong-yi / Sul-hee

Acting

Bae Soo-bin

Poong-chun

Acting

Sung Yu-been

Gam-cho

Acting

Lee Jun-ho

Yull

Acting

Lee Kyung-young

Teacher

Acting

Kim Tae-woo

Jon-bok

Acting

Kim Su-an

Gu-seul

Acting

Kim Young-min

King

Acting

Guzal Tursunova

Ju-gil

Acting

Moon Sung-keun

Lee Eui-myeong

Acting

Kim Won-jin

Fighter

Crew

Zhang Dong

Acting

Lee Sung-woo

Yu-baek's bodyguard

Acting