Kim Kap-soo

Kang Oh-hyeon, Kang Hyun-jo's father.

An Gil-seob, a terminally-ill senior living with his caregiver Yu-ri. He serves as an inspiration to others, having surpassed the life expectancy of his unnamed disease.

Joo Jong-soo, Chairman of the Yulje Foundation and Ro-sa's childhood friend.

Kim Hyung-chun

Song Hee-seop

Yang Jin-man, the assassinated President of the Republic of Korea (episode 1). He is the show's counterpart of President Robert Richmond.

Yi Sun, King Sukjong

Lee Kyu-ho

Hwang Eun-san

Lee Shin-mo- the rich father of Roo-ri and So-won. he's a gruff, self centered, abusive man who pampers So-won and disregards Roo-ri as a waste. however, later throughout the series, he grows to become kinder and kinder, revealing that he had always cared for Roo-ri

Park Kwan-soo

Shin Young-il, father of Ji-wook

Park Dong-Il

Lee Dong-chul

Bong In-jae

Yoo Seok-joo

Kim Chi-kwon, Finance Minister, Kim Eun-gi's father

Prime Minister Hwang Hui

Gong Soo-hwan, Gi-tae's father

Joo Jang-won

Choi Kook

Shin Dong-hyuk

Mr. Black

Ma Sook, a powerful wizard and Kang-rim's uncle. He was once a follower of Hong Gil-dong and part of the group Hwalbindang, but has betrayed Yuldo and set his sights to loftier kingdoms: He wants to conquer Joseon.

Director Kim

Sung Eun-pil (Yoon-hee's husband)

Kang Kye-man

Goo Dae-sung - Hyo-sun's father and Eun-jo's stepfather. Dae-sung is kindhearted, genuine, and loving. His character and goodness causes changes in everyone around him for the better.

Yi Jeong-mu, second state councillor and Seon-jun's father

Ji Seung, one of the six Royal Secretaries, 3rd senior rank. Head of the inquirers.

Baek Do-shik

Agwi

Kim Min-chul

Chief State Councillor Hwang Hui

Chief Jung Hak-soo

Oh Byung-jik, Soo-jung's father

Emperor Yang of Sui

Yoo Ki-young

Lee Tae-joon

Jo Jun-goo

Choe Chung-heon Ryu Deok-hwan as young Choe Chung-heon

Tae-seok's father

Jong Gan