Scarecrow appeared in the 1941 comic book called Batman. Scarecrow is a brilliant psychologist turned super-villain who fights Batman in Gotham City, specializing in techniques and chemicals that manipulate fear. Jonathan Crane was originally a well-respected professor, although he lost credibility when he obsessively took his experiments too far and descended into madness. He spends most of his time in Arkham Asylum and has been a member of the Injustice League, Injustice Gang, Secret Society of Super-Villains, Sinestro Corps.