Demon vampires and their hosts' hearts don't beat. Their blood is so great at processing oxygen and breaking down lactic acid inside their muscles it doesn't need to circulate. They still use their physical hearts as a way of slowly letting the blood travel by itself. A demon host has no change in their body temperature. If a demon reincarnates into a vampire, their skin is still cold, in a vampeal, their skin is still warm.
Thank you for all your support. Please Subscribe to my blog.