Arthur Fleck

Arthur Fleck, also known as The Joker, is a minor character who appears at the end of the 2020 DC Black film "NYGMA". He is a patient at Arkham State Hospital and noticed Edward Nygma when he arrived at Arkham State Hospital. Arthur's criminal alias is The Joker, a clown-themed supervillain who commits crimes for his own amusement. He is one of the most dangerous criminals in Gotham City.