A healer on a Gamma Quadrant world ravaged by the Dominion's blight, who offers the dying a peaceful death rather than a cure.
Trevean is the closest thing to a doctor left on the Gamma Quadrant planet visited in The Quickening, a world the Jem'Hadar punished for resisting the Dominion by infecting its people with an incurable disease called the blight. His role is to ease the passing of those whose lesions have quickened, giving them a swift and painless death.
Julian Bashir is appalled by Trevean's acceptance of death and sets out to find a cure, and the clash between the two men's outlooks drives the episode. Trevean was played by Michael Sarrazin.