Each take Ledger made was different from the last. Joker did not care for the people who worked for him; when one of his minions got electrocuted in his attempt at removing Batman's Mask, Joker laughed hysterically and then kicked him. Joker was also shown to be a fearless, and unpredictable fighter, who took on Mob henchmen and cops with ease and showed how lethal he was with many forms of weaponry such as shotguns, RPGs, machine pistols, handguns, explosives, and knives.
Joker then proposed that it was Batman's interference that had resulted in idealistic leaders like Harvey Dent rising in popularity, and offered his services to kill him for half of all the money that Lau, an illegitimate Chinese accountant, took away from Gotham in order for safe keeping. It all speaks to this idea of a character who's devoted to a concept of pure anarchy and chaos.
His casual insensitivity to pain, and his extreme fearlessness, let Joker take risks that a normal person couldn't even attempt, and most people just didn't see his attacks coming, i.e. It has a bit of "Inside. The Joker's obliviousness to danger made him invulnerable to what was usually Batman's greatest weapon in combat: his ability to frighten low-level thugs. Joker seemed genuinely upset when Batman didn't kill him, to the point where he admitted his defeat and referred to Batman as "incorruptible" after their last fight. Rachel then confessed her love for Harvey and agreed to marry him. Joker: Madness, as you know, is like gravity, all it takes is a little push. Despite his capture, no traces could be found on Joker's fingerprints, dental records, or DNA matches against the The Joker's own testimony, while normally quite true when it came to carrying out threats, seemed at times contradictory, and he was known to give conflicting accounts at times when he described past events in his life, more specifically how he got the scars of his characteristic Glasgow Smile. Like other portrayals of the Joker, Ledger’s is homicidal, hostile, and unhinged. This corruption, this decay in the texture of the look itself.
That, along with the same henchman, who was later revealed to have had a wired bomb that was surgically implanted inside him, showed that Joker had no problems inflicting pain upon people who worked for him. Though, subtly, Joker kept his finger in front of the hammer of the gun, which kept it from firing prematurely. Instead, Joker gleefully told Batman his view of people as selfish and violent, who only needed a little pressure before they descended into madness. English, USA. The Joker then made a call to a news program where The Joker, disguised as a female nurse at Gotham General Hospital.During the mass evacuation, the Joker disguised himself as a nurse and entered the hospital room of Harvey. Costume Designer Lindy Hemming described the Joker's look as reflecting his personality—that "he doesn't care about himself at all"; she avoided designing him as a vagrant but still made him appear to be "scruffier, grungier", so that "when you see him move, he's slightly twitchier or edgy." This Joker, however, is hyper-focused on the destruction of a civil society. The late Heath Ledger described the Joker as a "psychopathic, mass murdering, schizophrenic clown with zero empathy". He was played by Australian actor Heath Ledger. Though a unique portrayal, that Joker interpretation maintained much of his comic personality, such as his refusal to kill The Joker's scruffy and grungy make-up was intended as a reflection of his "edgy" character. When Batman interrogated him, Joker casually said that without Batman he'd have to "go back to ripping off mob dealers," which showed how little he actually cared about them.