Seo Ji-hye

Hong Ye-sool Lee Si-ah as young Ye-sool

Jiun Choi, a lieutenant of an investigative unit

Woo Do-hee, a producer-director at 2N BOX.

Seo Dan Park Seo-yeon as young Seo Dan

Yoon Soo-yeon, a thoracic surgical assistant. Also the daughter of the director of Taesan hospital, the main setting for this drama.

Sharon / Choi Seo-rin Lee Ji-eun as young Choi Seo-rin

Hong Hye-won

Choi Yeon-jin

Yoon Shin-ae

Shin In-jung

Heo Hwang-ok aka Sembavalam, the daughter of an Indian merchant who later becomes Su-ro's wife

Yeon Boon-hong

Hyang-dan

Ma Sang-mi

Princess Noguk, King Gongmin's first wife and a Yuan Princess. Banya, King Gongmin's concubine and Shin Don's maid. Bang Joon-seo as young Banya Jeon Ha-eun as child Banya

Cha Joo-ha

Kang Ye-rim, Seung-jae's twin sister