Do Do-hee/Wolsim

Jeong Gu-won/Seo Yi-sun

Joo Seok-hoon: Cheon-sook's...

Noh Soo-an: Cheon-sook's second...

Joo Cheon-sook: the founder and...

Jin Ga-young: a dancer whose...

Noh Seok-min: Cheon-sook's...

Kim Se-ra: Seok-min's wife who...

Assistant Shin

Park Bok-gyu: a director of the...

Yeon-seo

Killer

Dr. Kim Gi-tae

Choi Deok-ho

Detective Park

a homeless woman who later...

Cha Tae-joon

Seo Sang-yeon

Do-hee's mother

Do-hee's father

number two