Cardassian posing as a scientist on the wormhole relay project who was secretly an Obsidian Order agent sent to sabotage it.
Dejar is the third Cardassian scientist to join the relay project in Destiny, and she is greeted coldly by her colleagues Ulani and Gilora. She accompanies Sisko and Ulani on the Defiant to deploy the relay.
When a comet heads for the wormhole, the Defiant's modified phasers fail to vaporize it. Gilora accuses Dejar of sabotage, and she is revealed as an agent of the Obsidian Order, which opposes cooperation between Cardassia and Bajor.