The Secret Royal Inspector and Jo Yi

Taecyeon

Ra Yi-eon

Kim Hye-Yoon

Kim Jo-yi

Jae-Kyoon Lee

Park Tae-seo

Park Kang-sub

Gu-pal

Jin-Woong Min

Yook-chil

Chae Won-Bin

Bi-ryeong

Chae Won-Bin

Hwang Bo-ri

Bo-seok Jeong

Park Seung

Lee Sang-hee

Gwang-soon

Tae-Hwan Choi

Park Do-su

Tae-Hwan Choi

Park Do-soo

Chong-ok Bae

Ryu Deok-bong

Choong-seon Park

Sim Tae-son

Hyun Joon Kim

Ji Maeng-su

Hyun Joon Kim

Ji Maeng-soo

Kwan-Woo Jo

The King

Jung Soon-won

Cha Mal-jong

Hie-bong Jo

Officer Mi Ahn-hae

Kyung-Hwa Oh

Deok-bong's Helper

Kyung-Hwa Oh

Daek-gi [Deok-bong's Helper]

Ryu Si-hyun

Deok-bong's Helper

Ryu Si-hyun

Deok-Bong's Helper

Lee Jun-hyuk

Crown Prince