The stitcher believed to originally be a heroic name who fought against the Dead King in a crusade.
As a healer the name is inclined towards a supportive role. This named seems more inclined to stitching flesh rather than healing through miracles. Through the machinations of the dead king the Stitcher's abilities were used to control the flesh of the dead crafting homunculi.
Despite becoming a Revenant the Stitcher was able to combine multiple zombies and manipulate them to do the bidding of the dead king. This could be used to create a massive creature or controlling multiple small groups of dead enemies.