Neo Joker
Before she met the Clown Prince of Crime, Marian Drews was a depressed, self harming bank teller who had nothing to live for. She'd often cut her wrists in full view of everyone else, just to see if anyone cared enough to stop her. Then one day, she met the love of her life. The Joker robbed the Bank that she worked at, and pointed a gun at her head. Suddenly, she wanted to live. Instead of killing her, The Joker handed her a sack and told her to load it with money from the vault. Halfway through this, he started to call her Harley. Already terrified, Marian just went along with it, afraid that if she didn't that he would kill her. As soon as they left the bank and escaped the cops, The Joker handed her Harley's old costume and told her to put it on. It turns out that the original Harleen Quinzel had left Joker's crew a few months ago, and Marian had a striking resemblance to the former psychiatrist. As soon as they got back to his Ha-Hacienda, The Joker bandaged her wrist wounds, and then buried his head in her lap and began to cry. It was then that Marian realized that The Joker wasn't a monstrous demon, just a deeply damaged man who wanted someone to love him. Just like that, she became his new Harley Quinn. Sometime during their partnership, she modified the costume and made it look more like a Roller Skater than a Classic Jester. One night after The Joker broke out of Arkham Asylum for the umpteenth time, Batman chased him to a medical warehouse and force fed him a bottle of unknown pills. These pills had a rather unexpected effect on The Joker, restoring him to his former sane self. Returning to his identity of Jack Napier, he tried to propose to who he thought was Harleen Quinzel, but Marian rebuffed his advances. She loved The Joker, not Jack Napier. Before she could force makeup on Jack's face, she was kicked in the face by Harleen Quinzel, who had come to save her "Puddin". While Jack and Harleen were trying to make Jack the new councilman of Gotham City, they used very corrupt means in order to prove that Batman is the worst thing for the city. They used a combination of Clayface and Mad Hatter's mind-control tech to mind control all of the super villains of Gotham to go on a rampage and destroy a library that Jack had recently built in Backport, and all to prove that Batman can't solve every problem. Meanwhile, Marian decided to become the new Joker while Jack was gone from the role. She then found a warehouse where Jack was stashing all of the villains and the mind control tech. Cutting a deal with the Mad Hatter, she and Jervis mind-controlled the villains in order to go against Jack's orders and destroy the city. After attacking Wayne Manor, they managed to steal the blueprints for a giant freeze ray constructed by Thomas Wayne and Baron Von Fries, Mr. Freeze's father. They then found the ray and used it to freeze all of Gotham City, and gave the GCPD an ultimatum: either Jack turns back into The Joker, or she lets everyone in the city die. After a strained alliance between Batman and Jack Napier, Jack turned back into The Joker and battled Neo Joker within the caves where the ray was stationed. When the walls collapsed, Jack tried to sacrifice himself by driving the Batmobile into a narrow causeway and ejecting Harleen Quinzel onto one of the motorcycles, telling her to go and get Neo Joker. Fortunately, Jack survived and Marian was captured after she and Harleen had a fight. She was then taken to Arkham Asylum and became one of it's newest inmates. However, she got what she wanted, as Jack’s pills wore off and he become The Joker once again.