JOKER: intelligence and humor.
Intelligence, a sense of humor, a disturbing laugh, a purple dress and clown makeup.
The Joker is essentially a criminal, but he is definitely different from the other criminals in the city whose main purpose is to get rich.
The Joker seeks pleasure at all costs. He is not interested in money or power, he commits crimes for the sheer sake of it. The Joker is a diabolical genius who commits multiple acts of violence for the simple and pure pleasure of committing them. He describes himself as an "agent of chaos" who sows terror for his delight. He seems to be an opponent with no weaknesses, perhaps precisely because, following only pleasure, he has no real purpose: he is the essence of psychic anarchy.
He represents the freedom of the psyche.