Professor Jonathan Crane was bullied as a child for his bookish nature and scrawny figure. He became obsessed with fear and began to study it, eventually becoming a psychology professor in that field. He taught at Gotham University, but was fired for unethical experimenting. Professor Jonathan Crane then made a career out of villainy and became known as Scarecrow. Not only is he well-versed in fear, but Scarecrow uses it in his specialized toxins to bring out victims' nightmares.
- Ability: Fear Gas (Can be used once a day to gain a 3/4 chance of winning a fight with any enemy, except for Wonder Woman or Azrael)
- Weakness: Chiroptophobia (Only has a 3/4 chance of defeating Batman, Batwoman, and Black Bat without fear gas; using fear gas on Batman, Batwoman, or Black Bat will even the odds.)