Ma Seok-do (played by Don Lee) is a protagonist in The Roundup 5.
Veteran detective known as Monster Cop, leads the team against ruthless criminals with unmatched physical strength. Lee Kang-tae (played by Kim Jae-young) appears in The Roundup 5.
Rookie detective and Ma's loyal partner, skilled in agility and modern policing techniques. Ko Young-min (played by Seo Hyun-woo) appears in The Roundup 5.
Experienced detective and core team member, known for tactical expertise and steady leadership. Sword-Grabber (played by Park Hae-jin) appears in The Roundup 5.
Detective specializing in close-quarters combat, essential for high-risk tactical operations. Han Sang-gu (played by Lee Hak-ju) appears in The Roundup 5.
Dedicated detective and team member, provides reliable support during intense criminal investigations. Kim Min-Chul (played by Bek Hyun-jin) appears in The Roundup 5.
Skilled detective and loyal team member, excels in field operations and suspect apprehension. Buldak (played by Kim Min-ho) appears in The Roundup 5.
Tough detective and team member, known for resilience and direct confrontation tactics. Lee Hyun- Jae (played by Lee Yi-kyung) appears in The Roundup 5.
Detective and team member, contributes to tactical planning and street-level enforcement.