Main characters •
Lee Jin-wook as Cha Ji-won / Black • Lee Hee-seong as child Cha Ji-won •
Moon Chae-won as Kim Swan / Khaya / Baek Eun-young • Lee Chae-yoon as child Kim Swan (Baek Eun-young) •
Kim Kang-woo as Min Seon-jae • Jeong Jae-hyuk as child Min Seon-jae •
Song Jae-rim as Seo Woo-jin •
Yoo In-young as Yoon Ma-ri
Supporting characters ;People around Cha Ji-won •
Lee Won-jong as Go Sung-min •
Im Se-mi as Cha Ji-soo • Kwon Ji-min as child Cha Ji-soo •
Ha Yeon-joo as Mei •
Bae Yoo-ram as Ahn Gye-dong ;People around Kim Swan •
Kim Tae-woo as Kim Ji-ryoon •
Jung Hye-sun as Jeong Hyun-sook ;People around Min Seon-jae • as Baek Eun-do (Jo Seong-bae) •
Choi Jung-woo as Seo Jin-tak •
Lee Dae-yeon as Min Yong-jae • as director Nam Seong-woo • as general manager Park Beom-sik (Baek Eun-do's secretary) ;Extended cast •
Gil Hae-yeon as Hong In-ja •
Wi Ha-joon as Ha-joon •
Lee Jae-woo as Jae-woo • as Se-yang • • as general manager Choi • • • as inspector Kim Seong-min • • • • as Park Seok-min • as killer
Cameo appearances •
Jung Dong-hwan as Cha Jae-wan •
Lee Jae-yong as Yoon Jae-min • • Daniel Joey Albright as Top Investor Fred in episode 8 ==Ratings==