Mycroft Holmes in "The Greek Interpreter", his blundering approach to the case nearly costs the client his life. Mycroft resembles Sherlock, but is described in "The Greek Interpreter" as being "a much larger and stouter man". In "The Bruce-Partington Plans", the following description is given: Mycroft spends most of his time at the Diogenes Club, which he co-founded. He is the only character to refer to Sherlock exclusively by his first name. Mycroft Holmes has been portrayed many times in film, television, and radio adaptations of the Holmes stories. The character has been used many times in works that are not adaptations
Minor Sherlock Holmes characters Sherlock Holmes and Irene Adler. He appears in two pastiche novels by author John Lescroart, "Son of Holmes" (1986) and "Rasputin's Revenge" (1987). Lupa, a secret agent during the First World War, is strongly implied to be the younger version of fictional detective Nero Wolfe in the mystery series by Rex Stout. Enola Holmes is the younger sister and youngest sibling of Sherlock and Mycroft Holmes. She appears in the series "The Enola Holmes Mysteries" by Nancy Springer and it could be inferred that she appears in the story "The Copper Beeches" as Violet Hunter, however there is not enough