Harley Quinn is a popular fictional character from the DC Comics universe, originally introduced as a sidekick and love interest of the Joker. She is known for her playful yet chaotic personality, often blending humor with a penchant for mischief. Over the years, Harley has evolved from a mere villain to a complex anti-heroine, gaining her own fanbase and storylines. Her character is often depicted wearing a jester costume, symbolizing her connection to the Joker and her unpredictable nature. Harley Quinn has appeared in various media, including animated series, movies like Suicide Squad, and video games, making her a significant figure in pop culture.