Mycroft Holmes Holmes. Possessing deductive powers exceeding even those of his younger brother, Mycroft is nevertheless incapable of performing detective work similar to that of Sherlock as he is unwilling to put in the physical effort necessary to bring cases to their conclusions. In "The Adventure of the Greek Interpreter" Sherlock Holmes says: Though Sherlock initially tells Watson that Mycroft audits books for some government departments, he later reveals that Mycroft's true role is more substantial. While Conan Doyle's stories leave unclear what Mycroft Holmes' exact position is in the British government, Sherlock Holmes says that "Occasionally he "is" the British government
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