Queen Mantis

Go Hyun-jung

Jeong Yi-shin

Jang Dong-yoon

Cha Su-yeol

Cho Seong-ha

Joong-ho

EL

Na-hee

Kim Bo-ra

Lee Jung-yeon

Lee Hwang-eui

Jung Hyeon Nam [I Sin's father]

Kim Min-ho

Bae Seong Gyu [Detective]

Kim Tae-jeong

Choi Hyeok [Detective]

Park Wan-Hyeong

Son Ji An [Detective]

Han Dong-hee

Seo A Ra [Jung Yeon's friend]

Lee Tae-gu

Seo Gu Wan

Lee Yoon-geon

Hong Seung Pyo [Police commissioner general]