Chun Ho-jin

Minister of Military Taxation Yoo Je-se: Ji-sun's father who has absolute power who monopolizes wealth and power.

Choi Hyun / Grandpa Viva Park Ho-san as younger Choi Hyun

Yeom Je-ho

Nam Sang-bae

Seo Gi-tae

Song Young-dal

Choi Kyung-suk

Teacher Park Dong-joon

Lee Bo-hoon

Seo Tae-soo, the twins' father

Baek Do-ha, Tae-min's father

Lawmaker Baek

Yi Seong-gye (later King Taejo)

Jang Tae-soo

Yu Jeong-han

Prime Minister Jang Seok-joo, the primary antagonist of the series.

Na Il-pyung

Choi Woo-seok, director

Go Dae-ryong

Han Chi-gook

Lee Sam-jae

Kimura Taro (Father of Shunji; Chief of the Jongro police station, Chairman of Gyeongseong branch of Kishokai)

Kang Hyung-do

Choi Eung-chan

Choi Eung-chan

Choi Gook-hwan

Lee Eok-soo

Manshin, a shaman

Choe Hyo-won

Han Joon-soo

Kang Sang-hoon

Han Sung-hoon

Hong Taiji

Grand Prince (Hyojang Daegong) Lee Gyeom, Joon's father

Kim Jang-soo, Bo-ra's father

Jo Tae-sik