Longshadow is a fictional character appearing in DC Comics, primarily associated with the Justice League and Justice Society of America. He is known for his ability to manipulate shadows and darkness, often using these powers to combat heroes and achieve his goals. First introduced in the comics, Longshadow has been depicted as both a villain and an anti-hero. His complex background often involves themes of redemption and the struggle between light and dark, making him a compelling character within the DC Universe.