Spiritium is a major element in the world of Ciconia no Naku Koro ni. Most forms of energy use have been converted to Spiritium energy. When engines utilizing Spiritium convert energy, they expel large clouds of mist resembling water vapor. Spritium is converted into energy via a process called the Dreissig Conversion, a brain filter technique pioneered by Vier Dreissig. Using the Dreissig Conversion requires a large amount of glucose, resulting in those who use it needing large amounts of sugar.