The Grisha have powers that derive from what is called "Small Science" — the ability to manipulate matter. There are three orders of Grisha, and within them different specialities:
• Corporalki. Their powers involve the human body. This includes Heartrenders, who can manipulate a person's internal organs; Healers, who can heal; and Tailors, who can alter a person's appearance. Corporalki always wear red (with the exception of Genya — see below).
• Etherealki. Their powers involve the natural elements. This includes Squallers, who manipulate the wind; Inferni, who can manipulate fire; and Tidemakers, who can manipulate water. Etherealki always wear blue.
• Materialki. Their powers involve other materials. They are known as Fabrikators and are either Durasts, who can manipulate anything solid, or Alkemi, who manipulate chemicals. Materialki always wear purple.