Dagarth
- Full name: Dagarth
- Species: Romulan
- Gender: Female
- By July 2155: Commander, commanding officer, Romulan Star Navy, Romulan Guard; IRW Nel Trenco
- Field commander, Romulan telecapture tests (ENT Novel: Kobayashi Maru)
- Additionally in command of captured Klingon vessels as part of tests (ENT Novel: Kobayashi Maru)