The detective on the right is Sherlock Holmes, a fictional character created by Sir Arthur Conan Doyle. He is renowned for his keen observational skills, logical reasoning, and use of forensic science to solve complex cases. Holmes often works alongside his friend Dr. John Watson, as indicated by the iconic phrase "Elementary, my dear Watson!" which embodies their dynamic. Holmes is considered one of literature's most famous detectives, appearing in numerous stories and adaptations across various media.