Điệp Viên Thanh Xuân

Jeon Bae Soo

An Seok Ho [NIS team 4 team leader]

Jo Bok Rae

Ko Yeong Hun [NIS team 4 agent]

Yoon Ga Yi

Park Mi Jeong [NIS team 4 agent]

Lee Seo Hwan

Kim Hyeong Bae [NIS director]

Im Chul Hyung

Kong Jin Sang [NIS team 1 team leader]

Kim Min Ju

Lee Ye Na [Student council president]

Park Se Hyun

An Yu Jeong [Seok Ho’s daughter]

Jang Sung Bum

Park Tae Su [Student council member]

Lee Hyun So

Han Seung Jae [Student council member]

Kim Sun Min

Ji Hyeon Jun [Student council vice president]

Shin Jun Hang

Lee Dong Min [Student]

Jeong Soo Hyun

Im Yun Cheol [Student]

Kang Pil Jun

Son Beom Sik [Student]

Shin Ga Eun

Choi Su Jin [Student]

Kim Seung Beom

Kim Ho Jin [Informant]

Park Jin U

Park Jae Mun [Byeongmun high school president]

Oh Yong

Baek Gwang Do [Superintendent]

Lee Min Ji

Kim Ri An [P.E. teacher]

Noh Jong Hyun

Lee Jun Ho [Math teacher]

Kim Young Ah

Im Cheong Ha [Su A's mother]

Kim Soo Jin

Jang Man Ok [Seok Ho's wife]

Yun Chae Bin

Yun Chae Rin [Student]