Lim Hwa-young

So Hyun-jung

Crown Princess In-jeong

Min-ji

Choi Jeong-hye, Ho-cheol's wife and a police officer.

Park Yoon-ji

Yoon Seo-young, a well-known and intelligent profiler who analyzes cases and provides the criminal's profile. She cooperates with Dong-kook on his investigation.

Oh Young-shim

Kim Je-hee

Oh Kwang-suk

Cha Soo-hyun's younger sister

Han Song-yi