The mirror-universe Odo is the harsh supervisor of the Terran slaves in Terok Nor's ore processing centre, enforcing his own Rules of Obedience until Julian Bashir kills him during an escape.
In the mirror universe the shapeshifter Odo was found and put to work by the Alliance, and serves the Intendant as overseer of the ore processing centre on Terok Nor. He treats the Terran workers as property and governs them with his Rules of Obedience, punishing any breach on the spot.
He appears only in Crossover. When Julian Bashir is sent to the processing centre, this Odo takes particular pleasure in humbling him. During a plasma leak in the facility Bashir seizes a phaser and fires on him, and the changeling bursts apart.
The Intendant is furious at the loss of her overseer and demands that someone answer for it. He is the only changeling seen in the mirror universe, and his death leaves the station without the figure who kept its workforce in line.