Matt Monroe
- Full Name: Matt Monroe
- Date of Birth: 1873
- Place of Birth: Blue Hill, California
- Currently residing in: Bakersfield, California
- Parents: His mother is Kim Monroe, his real father is Chen Long (John Chinaman) but he was adopted by his step-father Dr. Monroe.
- Special characteristics: A fresh graduate of Pinkerton academy, an honest hardworking agent with a promising future. Obsessed about getting to know his real father Chen Long.
- Often seen with: Detective Wheeler and the other Pinkerton agents.
- Friends: His sister, Susan Monroe and Victoria Kelley
