Mantis

Yim Si-wan

As Lee Han-wool / Mantis

Park Gyu-young

As Shin Jae-yi

Choi Hyun-wook

As Benjamin Jo

Bae Gang-hee

As Yang Soo-min

Hwang Sung-bin

As Puma Lee

Yoo Su-bin

As Kim Dong-yeong

Jeon Bae-soo

As Nam Bae-soo

Jo Woo-jin

As Dok-go

Sul Kyung-gu

As Cha Min-gyu

Jeon Do-yeon

As Gil Bok-soon

Yang Dong-geun

As Gwang-cheon / Bi-cheon

Kim Joon-bae

As Mr. Bae

Park Kang-seop

As Manager Yoo

Do Yu

As Secretary

Ahn Seong-bong

As M.K Information Desk Staff

Seo Ji-oh

As Leaflet

Esom

As Cha Min-hee (archive footage)

Koo Kyo-hwan

As Han Hee-sung (archive footage)

Kim Seung-o

As Shin (archive footage)

Lee Yeon

As Kim Young-ji (archive footage)

Choi Byung-mo

As Hyun-chul (archive footage)

Kim Ki-cheon

As Su-guen (archive footage)

Park Kwang-jae

As Gwang-man (archive footage)

Jang In-sub

As Yoon-sub (archive footage)

Hwangbo Jung-il

As Bar owner

Park Seok-won

As Tatto man

Hwang Jin-woon

As Young Han-wool

Park Gyu-bin

As Young Jae-yi

Kim Chil-doo

As Old man

Sung Il

As Protester

Ha Seon-jae

As Bar friend

Ryu Seong-cheol

As Ssang-bong

Oh Chi-woon

As Cleaner

Aerok Kim

As Tatto Killer

Jang In-seo

As JB Enter. Killer

Han Sang-kyung

As Airport Killer