One of the main reasons why Harley Quinn stays with Joker is that she feels compassion for him. Despite all the bad things he had done, she sees him as a patient and sees herself as his psychiatrist.
Throughout their sessions, Harleen becomes convinced that the Joker is a victim who has been oppressed by the system. Harleen believes she is the only one who can truly understand and help the Joker. She ends up falling in love with him.
While the two worked together for years, the only one keeping any semblance of a relationship alive was Harley. Truthfully, the Joker was never that interested in Harley, save as someone he could easily leave holding the bag during his criminal endeavors.
Jarley is one of the most popular ships in the fandom (and not only in the fandom) and one of the most shipped. People love the dynamic of their relationship, because of it being ambiguous, extensive and interesting. The fact that the two are villains only makes the fandom ship them more.
As their sessions went on, Quinzel was gradually manipulated by the psychopath, using her own feelings of insecurity and disrespect she felt by the Arkham staff members. Eventually she fell in love with him, and she and the Joker began an escape plan.
This is how lore accurate Batman would've beaten the Suicide Squad (Animation)
Why does the Joker abuse Harley?
While they were dating, one of the most frustrating things for Harley was Joker's obsession with Batman and his lifelong goal of playing and eventually killing him. Back in the original, classic stories Joker and Harley Quinn they have together, Joker abused her the most when he didn't want Batman touched.
His men captured Harleen and strapped her to an electro-shock table, where the Joker administered electro-shock therapy, that combined with the Joker's twisted influence completely warped her mind. Harleen took the name "Harley Quinn" and became the Joker's girlfriend and accomplice.
Mad Love introduces Harley Quinn as a former psychologist named Harleen Quinzel who fell in love with the Joker during her internship at Gotham City's Arkham Asylum and details her transformation into the Joker's villainous accomplice Harley Quinn, as well as the Joker's lack of respect for Harley.
His abusive nature and love of alcohol frightened Harley, so she left and never looked back. Over time, Harley grew closer with her friend Ivy, who showed her what a healthy relationship can look like, and the two finally shared a tender kiss in DC Comics: Bombshells #42.
The Joker has had various possible origin stories during his decades of appearances. The most common story involves his falling into a tank of chemical waste that bleaches his skin white and turns his hair green and lips bright red; the resulting disfigurement drives him insane.
After Harleen Quinzel helped the Joker break out of Arkham Asylum, the Joker brought her to Ace Chemicals. There, he asked her to test her devotion to him by performing a trust fall into a vat of chemical solution below.
In Injustice: Gods Among Us, Harley Quinn reveals she gave birth to Joker's daughter, but gave her up for adoption rather than subject her to a life with Joker as a father. Similarly, Harley becomes a mother to twin children in the Batman: White Knight universe, though with happier results.
The most notable pet name that the Joker uses to refer to Harley Quinn is "puddin'" [2]. This nickname has become iconic in their relationship and is often associated with their dynamic.
It is then revealed that the Joker's real name is "Jack Oswald White." Martha then shares that she visited the Flashpoint universe's version of Jack Oswald White, discovering him to be a struggling family man supporting his wife and a child as a janitor at Wayne Casino.
Nicholson's Joker was a criminal who was physically and mentally altered after falling into a vat of hazardous chemicals. Heath Ledger's iconic take reinvented the character for a new age, permanently imbuing the clown with angst.
Unlike the more-sanitized and studio-friendly animated series, "Mad Love" depicts the Joker's verbal, physical, and psychological abuse of Harley Quinn. The issue portrays the slow decay of Dr. Harleen Quinzel and her transformation into the love-sick puppet known as Harley Quinn.
It's been rumored that in the "Ayer Cut" of Suicide Squad, Joker pushes Harley Quinn from the helicopter after he realizes she doesn't want to escape with him. Instead, Harley longs to head back and help her new friends. Ayer revealed on Twitter that it was true.
From the very beginning, with the award-winning comic book one-shot Mad Love, we see how Harley's criminal career sprang from her affection for the Joker and how those feelings were weaponized.
During more sessions, Harley's mind started to snap as her infatuation for the Joker grew, until one point, she helped him escape, dressing up like a harlequin jester to further try to endear herself to the psychopath, knocking out several guards in the process and taking on the new persona of Harley Quinn, the Joker's ...
Everyone knows Harley Quinn as the Jokers' girl, but how did she become Harley Quinn? Personality Disorder, specifically, Histrionic Personality Disorder plays a key part in Harley Quinn's life.
The psychopathology Arthur exhibits is unclear, preventing diagnosis of psychotic disorder or schizophrenia; the unusual combination of symptoms suggests a complex mix of features of certain personality traits, namely psychopathy and narcissism (he meets DSM-5 criteria for narcissistic personality disorder).
