Treir
- Full Name: Treir
- Species: Orion
- Gender: Female
- By April 2376: Slave under possession of the Orion Syndicate (DS9 Novel: Demons of Air and Darkness)
- April 24, 2376: Emancipated during Starfleet operation by Ro Laren (DS9 Novel: Demons of Air and Darkness)
- Began residence on Deep Space 9 following as dabo girl, partner in Quark's Bar (DS9 Novel: Demons of Air and Darkness)