ETYMOLOGY & PRONUNCIATION

Aether (ˈēTHər ) Walker (ˈwôkər )

Is an invented term by the author. However, Aether, (commonly spelt ether, and spelt æther in ancient times) refers to a substance thought to make up the universe. Before science referred to space as a vacuum, alchemists thought everything came from the aether and surrounded them. A view derived from Plato who expanded the view of the universe being made of four elements, to include Aether as the fifth: earth, fire, water, air, aether. Newton (arguably the most famous alchemist in history), "used the idea of aether to help match observations to strict mechanical rules of his physics."
[Margaret Osler, Reconfiguring the World. The Johns Hopkins University Press 2010. (155)]