Madison Hunter

'Madison I. Watson (née Hunter) is a character in the Sherlock Holmes fanon books. She is often regarded as Holmes and Watson's only female companion. Holmes always refers to her as "Miss Hunter" or "Miss Madison" while Dr. Watson calls her by his first name. In later life, she becomes Mrs. Madison Watson through her marriage to Dr. Watson and later gives birth to his daughter, Lucy Watson.

History
Just as Holmes predicts, Hunter is childhood friends with Dr. John Watson and sees their feelings for each other. However they remain oblivious to the details.

Trivia

 * Madison is not related to Violet Hunter.
 * According to Holmes, Hunter has an estranged older brother and is more closer to a sister. However they remain unnamed, but in Sherlock , her sister's named Elizabeth and her brother is named James