Ko Se-Hun

Young Sun Woo-hae

Ri Eul / Ryu Min-Hyuk [Teen]

Han Do-kyung

self

Na Woo-soo

Park Young / Young Prince

Han Ji-pyeong (young)

Teenage Moon Ha-won

Spirit of the Well

Park Sun-ho

Young Yoon Na-Moo

Young Jeong Jae-chan

Young Wang Won

Self

Park Jung-woo

Yi Bang-won (young)

young Yi Deok-hyeong

Young Gi Ha-myeong

Kang Dong-seok (young)

Han Tae-kyung (young)

Eun Se Gyeol

Hyeon-seok (young)

Young Lee Sung-ha

Kang Min-sung

Jin Ho

Choi Seung-Yoon

Ko Chan-Young [Young]

Gyo-ki (young)

Lee Minjo

Crown Prince of Joseon

Prince Eunpyeong

Young Choi Kang-ta

Choi Han-Gyul

young Kim Yoon-oh

Young Yoon Ji-hoo