Hwayi: A Monster Boy

Kim Yun-seok

Seok-tae

Yeo Jin-goo

Hwa-yi

Cho Jin-woong

Ki-tae

Jang Hyun-sung

Jin-seong

Kim Sung-kyun

Dong-beom

Park Hae-joon

Beom-soo

Im Ji-eun

Young-joo

Park Yong-woo

Det. Chang-ho

Kim Young-min

Jung-min

Seo Young-hwa

Seon-ja

Yoo Yeon-seok

Park Ji-won

Nam Ji-hyun

Yoo-kyung

Lee Kyung-young

Lim Hyeong-taek

Moon Sung-keun

CEO Jeon

Han Joo-wan

CEO Jeon's Attendant