Lee Yul-eum

as Oh Ha-na (12 episodes)

as Lim Le-na (12 episodes)

as Yang / 4F (8 episodes)

as Park Shi-young

as Soo-jin [The Woman in Red]

as Yoon Seol-a (10 episodes)

as Self (2 episodes)

as Self (2 episodes)

as Kang Mal-son

as Jo Young Ji (16 episodes)

as Han Jin-mi (32 episodes)

as Han Ji-Soo (10 episodes)

as Oh Soo-Yeon (young) (50 episodes)

as Ga-young (16 episodes)

as Oh Se-mi (123 episodes)

as Woo Yoo-mi (18 episodes)

as Jung Yoo-ah (17 episodes)

as Jo Eun-seo

as Jo Eun-Seo (1 episode), as Oh Eun-Soo (1 episode)