Doru is the son of Father Donavich, the priest of village Barovia. Strahd had turned him into a vampire spawn. The Wafflecrew tried to kill him, by request of his father, but Doru escaped. He was last seen fleeing on foot, with Ireena's sword stuck in his burning body.
When the Wafflecrew returned to Barovia and went back in time, they spotted Doru among those gathered for the wedding. Doru saw the group on the roof of the church. The group tried to abduct him but he eluded their grasp.