Sherlock Holmes (Sir Arthur Conan Doyle):
* Dr. John H. Watson: Sherlock's close friend, roommate, and chronicler of his adventures. He is often the narrator of the stories.
* Inspector Lestrade: A Scotland Yard detective who often works with Sherlock. While he initially doubts Sherlock's methods, he often relies on his deductions to solve cases.
* Mrs. Hudson: The landlady of 221B Baker Street, where Sherlock and Watson reside. She is a kind and observant woman, providing occasional insights into Sherlock's life.
* Mycroft Holmes: Sherlock's older brother, a high-ranking government official known for his vast intellect and influence. He occasionally helps Sherlock, usually from afar.
* Irene Adler: A mysterious and captivating woman who is the only person Sherlock considers his intellectual equal. She is known for her cunning and ability to outsmart even Sherlock.
Sherlock (BBC Series):
* John Watson: A doctor and former soldier who becomes Sherlock's flatmate and close friend. He acts as a voice of reason and provides emotional support.
* Mycroft Holmes: Sherlock's older brother, a government official who uses his intelligence and power to influence world events.
* Mrs. Hudson: The landlady of 221B Baker Street, who often acts as a mediator between Sherlock and John.
* Molly Hooper: A forensic pathologist who is attracted to Sherlock and often provides him with assistance.
* Inspector Greg Lestrade: A Scotland Yard detective who frequently works with Sherlock, despite finding his methods unusual and unorthodox.
* Mary Morstan: John's wife, who initially appears to be a harmless and supportive individual but later reveals a dark and mysterious past.
This is just a sampling of the main associates in each version of Sherlock. There are many other supporting characters that appear in the stories and TV series, each with their own unique relationship with Sherlock.