Lorillian
- Appearance: Mammalian; human-like but for a cleft along the bridge of their nose (ENT: "Broken Bow"; ENT Novel: Tower of Babel)
- Homeworld: Lorillia
- Odd biochemistry
- Children breathe methyl oxide until weaned onto oxygen at age four (ENT: "Broken Bow")
- Capable of surviving for short periods breathing methylacetylene (ENT Novel: Tower of Babel)