Well, Irene Adler stands out. She was a strong and intelligent woman in a time when women were often not shown in such a way. She was able to best Holmes in a way. Professor Moriarty is another. His devious mind and his power made him a formidable foe for Holmes. And Mary Morstan, Watson's wife, was also an important character. Her presence changed Watson's life and added a different dimension to the stories.
There's Mycroft Holmes, Sherlock's brother. He has an even more remarkable intellect in some ways, but he uses it in different areas, like government work. Also, Inspector Lestrade. He often calls on Holmes for help and represents the official police force. His interactions with Holmes add a lot of color to the stories. And Mary Morstan, Watson's wife, is also a memorable character as she is involved in some of the adventures.
Irene Adler is very memorable. She was able to outwit Holmes at times, which made her quite remarkable. Then there's Professor Moriarty, the arch - enemy of Holmes. His evil and brilliant mind made him a great antagonist.
Well, of course, Sherlock Holmes himself is the most memorable. His brilliant mind and unique deductive skills are what make the stories so fascinating. Then there's Dr. Watson, his loyal friend and assistant. Watson is important as he gives the reader a more 'normal' perspective compared to Holmes' extraordinary one.
Dr. Watson is surely a memorable character. He is Holmes' loyal friend and assistant. He chronicles Holmes' adventures, and his reactions and insights often provide a contrast to Holmes' brilliant but sometimes cold - blooded deductions.
One of the recurring characters is Inspector Lestrade. He has a bit of a love - hate relationship with Holmes. Mrs. Hudson, their landlady, is also a regular. She's the one who keeps their place in order. And then there's Mycroft Holmes. He has a different kind of intellect compared to Sherlock and his presence adds another layer to the stories.
Sherlock Holmes is the main character, of course. He is a brilliant detective with extraordinary powers of observation and deduction.
The main characters are Sherlock Holmes and Dr. John Watson. Holmes is the brilliant detective, and Watson is his friend and the narrator of the stories.
I think 'A Study in Scarlet' is also very popular. As the first Holmes story, it sets the foundation for the whole Sherlock Holmes universe. It introduces the unique characters and the method of Holmes' detective work. Additionally, 'The Sign of Four' is popular as well. It has a great story of mystery and adventure, with a lot of action and twists in the plot.
Sherlock Holmes himself is of course the most memorable. His eccentricity, his love for playing the violin, and his drug use (cocaine in some cases) all add to his complex character. He is a genius detective, always one step ahead in solving crimes.
The person who illustrated the original Sherlock Holmes stories was Sidney Paget. His illustrations helped shape the public's image of the characters and added to the popularity of the stories.