Dr. Jonathan Crane, also known as the Scarecrow, is a Gotham City supervillain and a major enemy of Batman. The Scarecrow is an overly-obsessive and deranged ex-professor of psychology who uses a variety of drugs and psychological tactics to use the fears and phobias of his adversaries. He does not commit his crimes for wealth, but rather as a form of "research" to further study the effects of fear on humans, making Gothamites his unwilling guinea pigs. 