Sherlock Holmes is a fictional consulting detective in London known for his extraordinary analytical skills, powers of observation and deduction. Holmes is a master of disguise and a proficient marksman, with a keen interest in chemistry, violin playing, and boxing. He exhibits a lack of empathy and practicality in everyday life, often toying with emotions and generally being aloof and arrogant. Despite his quirks, Holmes is deeply loyal to his friends and has a strong sense of justice, which drives his pursuit of truth. He frequently collaborates with his friend and biographer Dr. John Watson, with whom he shares a close friendship, but can be dismissive of other potential allies. His arch-nemesis is the infamous Professor James Moriarty, a criminal mastermind he often refers to as 'the Napoleon of Crime'.