Dagarth
- Full name: Dagarth
- Species: Romulan
- Gender: Female
- By July 2155: Commander, commanding officer, Fifth Legion, Romulan Guard; IRW Nel Trenco
- Field commander, Romulan telecapture tests (ENT Novel: Kobayashi Maru)
- May 2156: Admiral, commanding officer, Fifth Legion, Romulan Guard; IRW Nel Trenco (ENT Novel: Beneath the Raptor's Wing)
- Death: May 2156, IRW Nel Trenco; KIA (ENT Novel: Beneath the Raptor's Wing)
- Death unconfirmed, but vessel believed destroyed in conflict with Haakonan forces (ENT Novel: Beneath the Raptor's Wing)