Personality disorders. In general, Arthur appears to have a complex mix of features of certain personality traits, namely narcissism (since he craves attention by any means) and psychopathy (since he demonstrates no empathy for his victims).
According to the Mayo Clinic, "Pseudobulbar affect (PBA) is a condition that's characterized by episodes of sudden uncontrollable and inappropriate laughing or crying." Echoing the language on the Joker's laminated card, PBA can indeed occur in people with brain injuries, stroke, or certain neurological conditions such ...
The Joker is clearly a psychopath. He has no conscience. He has no empathy for anybody. He's this agent of chaos and you're just not sure, does he really know what he's doing or not?”
People with high functioning autism also have a narrow set of interests. Joker was not autistic, because he seemed to deeply desire social connection (most of his fantasies were surrounding connecting with others).
He said the Joker doesn't fall into the criteria for diagnoses like schizophrenia or bipolar disorder. He is more likely to be a psychopath, but even that is reductive.
Personality Disorder, specifically, Histrionic Personality Disorder plays a key part in Harley Quinn's life. People with Histrionic Personality Disorder are “pervasive and excessive emotionally and display attention-seeking behavior” (Bornstein 1998).
The condition known as pseudobulbar affect (PBA) is characterized by brief uncontrollable outbursts of crying or laughter that are incongruent with the patient's feelings of sadness or joy.
The character of Arthur Fleck is an authentic and well-researched depiction of a man with borderline personality disorder.
From six of psychological disorder who described by Cherry (2019) there are just three which Arthur has schizophrenia/delusional, trauma and dissociative disorder.
His disorders
Michael has a disorder called catatonia. Michael Myers is sometimes disabled from moving whenever he either sits or stands. This makes sense because it explains why Michael walks after his victims rather than running.
Fleck has PBA, a condition with uncontrollable laughing and crying outbursts. His sickly thin body is the result of the medication he takes.
Inside Harley Quinn's Mind and Possible Mental Disorder
Quinn comes across as a psychotic sociopath who enjoys hurting people. Her actual condition, however, isn't addressed and remains a mystery.
Batman's Personas
When looking at the Caped Crusader, three distinct personalities emerge. This is an artificially constructed case of dissociative identity disorder, designed to keep his identity and emotional wellbeing safe.
Fans trust Jinx suffers from Borderline personality disorder, PTSD and Schizophrenia, while Vi has extreme childhood trauma.
Phoenix, though, still manages to make us feel empathy for the character, the key to which was understanding the trauma Arthur Fleck – the Joker's name – has been through. "When I read through the script, I noticed the traits of PTSD," Phoenix tells GamesRadar+ and Total Film (opens in new tab).
Mainly in the comics, Harley Quinn is was seen to suffer from visions or fantasies, which could easily be interpreted as psychoses. This is not a trait of BPD but is actually a symptom most commonly associated with Schizophrenia or Schizotypal.
Joker had no anxiety symptoms. He did not present with any significant obsessive compulsive phenomenon. Medical systems review was non-contributory.
Which personality type is Arthur Fleck, AKA Joker? Arthur Fleck is an unhealthy INFP personality type. He is one of the few INFP villains to exist both in fiction and reality.
In 2009's Superman/Batman #65, the Joker's greatest fear is losing control of the joke—being perceived by his audience not as the master, but as its subject. The Joker claims it's all in fun, but being laughed at is the worst fate he can imagine.
Martha reveals that she forced Psycho-Pirate, a villain with extensive knowledge of the entire DC Universe, to tell her the name of the Joker in the main DC Universe. It is then revealed that the Joker's real name is “Jack Oswald White.”
He has a congenital disease where he can't stop smiling, and it's horrific. His face is half-covered throughout most of the film.
Poison Ivy is traditionally portrayed as a seductress who uses her powers to make others do her bidding. But to only see this side of her does a disservice to the character. Ivy is motivated to protect nature against humanity, a crusade that's exacerbated by her suffering from Seasonal Affective Disorder (SAD).
Presumably, he suffers from the neurological condition pseudobulbar affect – also known as “emotional incontinence” – perhaps caused by his childhood head trauma.
Best known as the former girlfriend of the Joker, Harley suffers from multiple personalities, homicidal tendencies, Stockholm syndrome and possibly “shared psychotic disorder.” A survivor of domestic violence (not surprising, given her former beau), she has murdered grown-ups and kids.
Through her aggression, deceitfulness, theft, and serious violation of rules, Selina displays traits of conduct disorder, the childhood precursor to antisocial personality disorder.