Mycroft Holmes Mycroft Holmes Mycroft Holmes is a fictional character appearing in stories written by Sir Arthur Conan Doyle. He is the elder brother (by seven years) of detective Sherlock Holmes. He is described as having abilities of deduction and knowledge exceeding even those of his brother, though their practical use is limited by his poor physique and dislike of fieldwork. The character has been adapted in various pieces of literature and media, including television series, movies, radio, and comics. He is also popular in culture, being mentioned by many works, which mostly reference his job, personality, or his relationship with Sherlock
Minor Sherlock Holmes characters actually a coded message that invited Sherlock to Eurus's room, allowing Sherlock to save his friend by making a genuinely emotional appeal to Eurus, giving her the love of an older brother and a form of relationship he'd denied her as a child, which convinces her to stand down. She is returned to incarceration, with Mycroft describing her as reduced to a catatonic state, although she responds in duet when Sherlock plays the violin near her cell. Mary Russell is a fictional character in a book series by Laurie R. King, focusing on the adventures of Russell and her mentor