Sherlock Holmes is a fictional detective created by Sir Arthur Conan Doyle. He is known for his incredible powers of deduction, vast knowledge, and use of forensic science to solve difficult cases. He has a somewhat abrasive personality, is socially awkward, and often insults his friend and biographer Dr. Watson unintentionally due to his preoccupation with his thoughts. Holmes has a preference for Victorian-era clothing and is an avid violinist. He is often at odds with the criminal element of London, especially his arch-enemy, Professor Moriarty. Holmes' brother, Mycroft, also plays an important role in his life, although they have a complex relationship.