https://batman.fandom.com/wiki/Scarecrow

https://en.m.wikipedia.org/wiki/Scarecrow_in_other_media

Scarecrow, is a DC Comics supervillain and an enemy of Batman.

His scarecrow costume, lanky appearance and surname were inspired by Ichabod Crane of the horror fable "The Legend of Sleepy Hollow".

The Scarecrow is an overly-obsessive and deranged ex-professor of psychology who uses a variety of drugs and psychological tactics to use the fears and phobias of his adversaries. He does not commit his crimes for wealth, but rather as a form of "research" to further study the effects of fear on humans (later, he does it to satisfy his own psychopathic desires), making the innocent citizens of Gotham his unwilling guinea pigs.