The Joker (Arthur Fleck)

"What do you get when you cross a mentally ill loner with a society that abandons him and treats him like trash?! I'll tell you what you get, you get what you fucking deserve!"

- Arthur Fleck to Murray Franklin before he shoots him on live telivision

Arthur Fleck was a infamous Gotham terrorist, criminal and anarchist who was the original Joker before his death when Batman first appeared and the second Joker's appearance. Because of his tragic life, Arthur became the Joker, and led a mass shootout at the Murray Franklin show where Murray himself was personally shot in the head by Fleck. After terrorizing Gotham for years, he was finally arrested and taken in by Captain Bill Cranston alongside Jim Gordon. In Arkham Asylum, he was stabbed and beaten to death in his own cell by other inmates during Batman's first year.