Jonathan Crane (Earth-6531)

"There's nothing to fear, but fear itself! And I'm here to help!"

- - Scarecrow

Jonathan Crane, PhD, is a former psychiatrist and neurosurgeon at Arkham Asylum who developed the Fear Toxin from experiments with the Bhutan blue flowers in conjunction with Ra's al Ghul. Under the pseudonym of the Scarecrow, Crane conducted his operations in secrecy at an underground laboratory in Arkham Asylum.

Early Life
Born in October 20th, 1973, Jonathan Crane became a respected neurosurgeon after many theories regarding human mind. He gained a job at Arkham Asylum as lead psychiatrist, crafting a theory in which he sought to prove fear was the basis to all of humanity.

Alliance with Ra's al Ghul
He finally achieved this opportunity when he was approached by the mysterious benefactor Ra's al Ghul, who, inspired by Crane's experiments, offered him to test his proposed drug on the entirety of Gotham City and be rewarded beyond imagination. Because he was led to believe Ra's only wanted to hold Gotham for ransom, Crane agreed to help him, and was able to weaponize the compound found at the League of Shadows' blue flowers, thus creating the Fear Toxin, a hallucinogen drug capable of inducing nightmares into others. Manipulating the crime lord Carmine Falcone into smuggling the Toxin's ingredients through Gotham, Crane helped him by pledging the insanity of Falcone's henchmen so they could go to Arkham Asylum and help him developing the drug at a secret underground laboratory.

The Batman
"I respect the mind's power over the body. It's why I do what I do."

- - Doctor Jonathan Crane