Sherlock Holmes is a fictional private detective created by British author Sir Arthur Conan Doyle. He is known for his remarkable powers of deduction, keen observation, and logical reasoning. Holmes' personality is characterized by his aloof nature, arrogance, and passion for solving mysteries. He prefers logic over emotion and often appears cold and detached. Holmes enjoys smoking a pipe and is fond of violin music. His relationship with Dr. John Watson, his loyal friend and biographer, is central to the series of short stories and novels. He is frequently in conflict with various adversaries, among them his intellectual equal, the criminal mastermind Professor Moriarty.