History: Ex-professor, did experiments based on fear, was sent to Arkham Asylum after killing a fellow professor. The Scarecrow is an expert in psychology, with a focus on fear, and is a former certified professor on the subject. He has now been released.
Personality: Serious, somewhat insane.
Others: The Scarecrow is a man who uses a fear based substance called "Fear Gas" to project your deepest darkest fear that causes his victims to hallucinate that their phobias have come to life. He wears his Scarecrow mask to enhance the effect of the hallucinogen (instilling fear in all who see him) as well as to avoid being poisoned by his own toxin. Although not physically intimidating, Scarecrow is adept in physical combat.