I, the Executioner

Hwang Jung-min

Seo Do-cheol

Jung Hae-in

Park Sun-woo

Oh Dal-su

Oh Jae-pyeong

Oh Dae-hwan

Wang Dong-hyun

Jang Yoon-ju

Bong Yoon-ju

Kim Si-hoo

Yoon Shi-young

Jin Kyung

Lee Joo-yeon

Shin Seung-hwan

Park Seung-hwan

Jeong Man-sik

Jeon Seok-woo

Kwon Hae-hyo

Choi Wan-ki

Byun Hong-jun

Seo Woo-jin

Tue Minh

Tue

Ahn Bo-hyun

Min Kang-hoon

Huh Joon-ho

Kang Hang-jo

Hyun Bong-sik

Ddeokchil

Kim Jae-hwa

Madam

Park Jun-myun

Gambling Group

Park Kyung-hye

Gambling Group

Joo Bo-bi

Gambling Group

Kim Won-hae

Former Team Leader

Park Myung-shin

School Principal

Ahn Sang-tae

Dean of Students

Woo Jeong-won

Chi-hoon's Mother

Jo Kwan-woo

Chi-hoon's Father

Kim Min-su

MC Wrecka

Seo Young-joo

Fake Haechi

Heo Nam-jun

Detective

Nam Jin-bok

Police

Yun Jun-yeol

Shin Chi-hoon

Hwang In-mu

Fire Fist TV

Kim Han-sol

Reporter