Scarecrow (comics)

The Scarecrow or Dr. Jonathan Crane is a fictional Batman supervillain who appears in American comic books published by DC Comics. He uses fear gas to scare his victims and even Batman. He wears a scarecrow mask and a scarecrow costume. 
He first appeared in "World's Finest Comics" #3 (September, 1941). 
Story.
Jonathan Crane was bullied at school. He was called mean names like "Ichabod Crane", because he looked like the character Ichabod Crane from the book Sleepy Hollow. Because of this, he became obsessed with fear. He became a psychologist and learnt about fear. He lost his job for using his patients as tests for his fear gases and drugs. He then became a criminal.
Portrayals.
He was played by Cillian Murphy in "Batman Begins", "The Dark Knight", and in "The Dark Knight Rises".