Mask: Cast
Soo Ae
Byun Ji-sook / Seo Eun-ha
Ju Ji-hoon
Choi Min-Woo
Yeon Jeong-hun
Min Seok-hoon
Yoo In-young
Choi Mi-Yeon
Jeong Dong-hwan
Byun Dae-sung
Yang Mi-kyung
Kang Ok-soon
Lee Ho-won
Byun Ji-hyuk
Jeon Kuk-hwan
Chairman Choi Doo-hyun
Jo Yoon-woo
Oh Chang-soo
Park Joon-geum
Mrs. Song
Jo Han-sun
Kim Jung-tae
Shin Dong-hoon
[Big guy]
Amy Aleha
[Scientist]
Lee Sung-deuk
Byun Ji Sook's high school classmate
Lee Yoon-jeong
Byun Ji-sook [Young]