Female Changeling

The Female Changeling is a Founder, one of the shapeshifters who rule the Dominion, and acts as the leader of the Great Link in Deep Space Nine. She first appears in "The Search" when Odo finds his people, and repeatedly tries to persuade him to return, while punishing him by forcing him into human form after he kills another Changeling. During the Dominion War she directs the alliance with Cardassia and the Breen, even as a disease engineered by Section 31 ravages her. In the finale Odo links with her and cures her, persuading her to surrender and stand trial.