The Demon Elementals are demons who inhabit Mid-World. There are six of them, one for each of the Beams. Although there are only six, each demon has two different aspects, a male form as well as a female one. Roland Deschain and his ka-tet encountered one of the demon elementals twice in their journey along the Beam. Once in the Willow Jungle in the foothills of the Cyclopean Mountains and once in the Plains of the River Barony.