On screen
Cast
16 credited performers
Lee Byung-hun
Yu-baek / Duk-gi
Jeon Do-yeon
Sul-rang / Wol-so
Kim Go-eun
Hong-yi / Sul-hee
Bae Soo-bin
Poong-chun
Sung Yoo-bin
Gam-cho
JUNHO
Yull
Lee Kyung-young
Teacher
Kim Tae-woo
Jon-bok
Kim Su-an
Gu-seul
Kim Young-min
King
Artwork unavailable
Guzal Tursunova
Ju-gil
Moon Sung-keun
Lee Eui-myeong
Artwork unavailable
Kim Won-jin
Fighter
Zhang Dong
Character not listed
Lee Sung-woo
Yu-baek's bodyguard
Artwork unavailable
Sin Sam-bong
Fifth Ranked Officer of Royal Security Forces