Romulan
- Appearance: Mammalian; skin tones range from sallow green to dark brown, ears slightly pointed
- Homeworld: Romulus
- Originally Vulcan
- Major offworld populations: Throughout the Romulan Star Empire
- Copper-based blood
- Distantly related to the Zami
- Descendant of the peoples of the Arret Empire
- A distant branch of Vulcans, having departed the homeworld centuries ago following the Time of Awakening
- Largely biologically similar to Vulcans, but genetic drift has made them differentiable with careful scanning
- Among other differences, Romulans lack the telepathic talents of Vulcans
- Cultural notes
- Romulans, as with Vulcans, consider danger associated with green, safety with orange (ENT Novel: The Good That Men Do)
- Derived from the fact that their blood is naturally green, and plant life was extremely rare on Vulcan, giving little-to-no innate association between nature and green
- As a result, status displays use a green/orange color scheme rather than the more common Human red/green scheme (ENT Novel: The Good That Men Do)
- Gods
- Erebus
- Associated with fire (ENT Novel: The Good That Men Do)
- Erebus
- Romulans, as with Vulcans, consider danger associated with green, safety with orange (ENT Novel: The Good That Men Do)
History
- c.4th century: The subculture that would become Romulans voluntarily exiled themselves from Vulcan, traveling across space and eventually reaching Romulus and Remus
- c.19th century: "First contact" with Vulcans
- Beginning of the Vulcan-Romulan War
- 2152: First contact with Humans