A militaristic Delta Quadrant power that treats telepaths as criminals, subjecting every ship crossing its vast territory to repeated inspections and sending any telepaths found to detention camps.
The Devore Imperium features in the Voyager episode Counterpoint. Its space is too large to go around, so Voyager submits to searches by inspection teams under Kashyk, who has classical music played over the ship's speakers to put the crew at ease.
Janeway is smuggling a party of Brenari refugees, together with Tuvok and the ship's other telepaths, by holding them in transporter suspension during each inspection. Kashyk then arrives alone asking for asylum and helps her find the wormhole the refugees need, and a cautious romance develops between them.
His defection is a ruse to learn the wormhole's position. Janeway has never fully trusted him, and when his warships return he finds the refugees already gone and the cargo containers full of vegetables. Rather than record the failure, Kashyk lets Voyager go.