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- "I am the master of fear! The dark lord of despair! Cower before me and witness terror!
"Hi, Professor Crane!"
(normal voice) "Good evening, child. (then) Worship me, fools! Worship me! Scream hosannas of anguish to Scarecrow, the all-terrible god of fear!"
I think he's getting better"
- ―The Scarecrow, Harley Quinn, and Robin I in Harley's Holiday
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.