Etherials

They are not any particular race to be said. They are simply those who found a way to ascend past a physical body. There are two types: Shadow and Light. Light simply look like ghosts with very little interaction with the world, the Shadow look like evaporating shadows and also have very little interaction with the world. Like their titles say, they require their essence (light or darkness) in order to exist and can pass from one source to the next. A very famous one is Azriel De Lang, companion to Cameron of Trynhawk.