- Tomoya Nagase
- Hayase, Yûtaro (Japanese detective)
- Choi Min-soo
- (as Min-su Choi)
- Seong Choi
- (as Sung Choi)
- Kim Dong-wook
- Member of Intelligence Division V
- Jin-myung Go
- Detective Park at Seoul Central Police Agency
- Shim-young Hahm
- Member of Intelligence Division V
- Kim Ji-youn
- Yung Kyeong-hwi
- Ki-won Kang
- Detective Lee at Seoul Central Police Agency
- Do-hyung Lee
- Hwang at Intelligence Division V
- Kyung-hwan Park
- Member of Intelligence Division V
- Young-jin Park
- Member of Intelligence Division V
- Poong-youn Won
- Detective Yang at Seoul Central Police Agency
- Lee Yoon-gun
- Choi Chief at Intelligence Division V
