This papercraft is The Joker, based on the film The Dark Knight of the Batman series, the paper toy is designed by Little Plastic Man. The Joker is a supervillain and the archenemy of Batman. In The Dark Knight, the Joker is depicted as a maniacal criminal mastermind who terrorizes Gotham City and whose goal is to create "a world without rules".
No one knows who the Joker really is. Little can be confirmed regarding his early life before he turned to a life of crime. Despite his capture, no traces could be found on his fingerprints, dental records, or DNA matches against the GCPD's databases.
In a report filed by the Gotham City Police Department, there were three theories presented for the Joker's origin and identity. The first was that the Joker was an escaped patient from Arkham Asylum. However, this theory is debunked on the basis that his identity has no basis within any records. The second theory was that the Joker was a former employee of the Haley Brothers Circus, which was documented to have connections with the mob. It is reasonable to theorize that the Joker is a disgruntled former employee that had bad business with the mob. The third theory presented was that the Joker is a former soldier suffering from acute PTSD, explaining his cool demeanor and familiarity with weapons, as well as his devastating effectiveness in various forms of combat.
Shortly after the death of Ra's al Ghul, Batman discussed with Lieutenant James Gordon the effect that he had made on Gotham City since his appearance. Gordon then revealed that a criminal with "a taste for theatrics" recently committed a double homicide and an armed robbery, leaving behind a Joker playing card as a "calling-card". Gordon also warned that just as escalation occurs in terms of the police force against crime, so might the scale and style of criminality change in reaction to Batman's appearance.
Some time later, the Joker would orchestrate the theft of a large shipment of ammonium nitrate from the Gotham Docks. The explosive chemical was saved for storage in the Gotham General Hospital and on two passenger ferries some time later. In addition, he also frequently attends the various heists and crimes his gang commits while disguised as one of the accomplices, which is believed to be at least partially where he got his name from.
Several months later a group of bank robbers, under the direction of the Joker, robbed Gotham National Bank which was used as a money-laundering front for Gotham's gangs. The clown mask wearing robbers whittled down their own numbers within minutes in a series of calculated betrayals. Finally only "Bozo" remained, who revealed himself as the Joker to the manager of Gotham National Bank, who had earlier confronted the robbers with a shotgun. The Joker then escaped with the bank's cash in a yellow school bus, concealing his identity by driving within a convoy of other buses, and also leaving the manager at the mercy of a gas grenade stuck in his mouth.
The Joker in The Dark Knight is a genius at planning and improvising criminal activities. He is incredibly intelligent and calculating, always staying one step ahead of everyone else, including Batman and the police. His unique worldview, as well as the complete mystery surrounding his identity also give him something of an edge. Having no connections, friends, former identities or family to be traced back to makes him very difficult to predict, track down, or even understand. He is also shown to be a skilled, fearless, and unpredictable fighter, taking on mob henchmen and cops with ease, and showing how he can be lethal with many forms of weaponary; and was even capable of holding his own against Batman and trapping him near the climax of the film. One explanation for the Joker's fighting skills might have to do with his psychotic personality: the Joker doesn't really fear physical damage to himself like a normal person would, and even when brutally injured laughs at his own pain. His casual insensitivity to pain, and his extreme fearlessless, lets him take risks that a normal person wouldn't even attempt, and so most people just don't see his attacks coming, i.e. walking into a room full of mobsters and casually using a 'magic trick' to impale a pencil into one of their heads. The Joker's obliviousness to danger makes him invulnerable to what is usually Batman's greatest weapon in combat: his ability to frighten low-level thugs.
Quite tall, though notably shorter than Batman, dressed in a custom tailored suit consisting of an elegant, purple coat with matching pin-stripe pants. Underneath it, he wears a light blue jacket, green vest, and a light purple patterned shirt. Almost always seen wearing white make-up with blackened eyes and red smeared over the already gruesome scars, greasy, green-dyed, unkempt hair on his head only further implies his unstable psyche. This outfit and make-up gets increasingly worn throughout the film, showing that the Joker indeed cares little for just about anything.
You can download the batman paper model here: Batman: The Dark Knight - The Joker Free Paper Craft Download