Mavi Sakal, or "Blue Beard," is a character from a popular French fairy tale written by Charles Perrault. The story revolves around a wealthy man with a mysterious past, known for his blue beard, who marries several women, all of whom mysteriously disappear. The tale explores themes of curiosity, trust, and the consequences of disobedience. In the story, Mavi Sakal gives his new wife the keys to his castle but forbids her from entering one specific room. Driven by curiosity, she eventually disobeys him, leading to shocking discoveries. The narrative serves as a cautionary tale about the dangers of curiosity and the importance of heeding warnings.