Twin-Headed Ogres are a race of undead ogres that first appeared during the Busan Gate. They are about the size of small buildings and look as if they were made from two separate one-headed ogres crudely stitched together.
Twin-Headed Ogres are considerably powerful, to the point that they are able to take on multiple A-Rank Hunters at once and are notoriously known by the nickname "Gravekeepers," partially because they are often found in dungeons that contain undead magic beasts. As a result, they usually appear as dungeon bosses, although there are exceptions where they appear as foot soldiers instead.