Robin, The Boy Wonder
He was first introduced in Detective Comics #38 (1940) by Batman creators Bill Finger and Bob Kane. Robin's debut was an effort to make Batman a lighter, more sympathetic character. DC Comics also thought a teenaged superhero would appeal to young readers, being an effective audience surrogate. The name "Robin, The Boy Wonder" and the medieval look of the original costume are inspired by the legendary hero Robin Hood, as well as the red-breasted American Robin, which parallels the "winged" motif of Batman. Dick Grayson was born on the first day of spring, son of John and Mary Grayson, a young couple of aerialists.
In his first appearance, Dick is a circus acrobat, and with his parents make up the "Flying Graysons". While preparing for a performance, Dick overhears two gangsters attempting to extort protection money from the circus owner. The owner refuses, so the gangsters sabotage the trapeze wires with acid. During the next performance, the trapeze from which Dick's parents are swinging snaps, sending them to their deaths. Before he can go to the police, Batman appears to him and warns him that the two gangsters work for Tony Zucco, a very powerful crime boss, and that revealing his knowledge could lead to his death. When Batman recounts the murder of his own parents, Dick asks to become his aide. After extensive training, Dick becomes Robin. They start by disrupting Zucco's gambling and extortion rackets. They then successfully bait the riled Zucco into visiting a construction site, where they capture him.
Robin's origin has a thematic connection to Batman's in that both see their parents killed by criminals, creating an urge to battle the criminal element. Bruce sees a chance to direct the anger and rage that Dick feels in a way that he himself can not, thus creating a father/son bond and understanding between the two. Throughout the 1940s and 1950s, DC Comics portrayed Batman and Robin as a team, deeming them the "Dynamic Duo", rarely publishing a Batman story without his sidekick; stories entirely devoted to Robin appeared in Star-Spangled Comics from 1947 through 1952.