Kim Gyu-ri (actress, born August 1979)

Seo Jin-ha

Choi Kang-yeon, First Lady of South Korea, Park Mu-jin's wife and a human rights lawyer. She is the show's counterpart of Alex Kirkman.

Kim Joon-ah (Ep. 5-10)

Heo Da-hae (36-year-old, Gap-dol's elder sister)

Lady Gwi-in of the Kim clan

Gook Yeo-jin

Jang Joo-ha Jo Min-ah as young Jang Joo-ha

Lee Yeol-joo

Woo Seung-hee, the main villain Park Eun-bin as young Seung-hee