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
Young Sherlock Holmes: Death Cloud a free-spirited, outspoken girl. She is described to be a red-haired lass with violet eyes, tanned skin, and freckles. She is an excellent horseback rider. Mrs Eglantine Holmes Manor; she is sinister and does not welcome new guests. Mycroft Holmes told Sherlock in a letter, that she is "no friend to the Holmes family". The Baron is the mastermind behind the mystery of the Death Cloud, and because of serious injuries sustained by him at the Charge of the Light Brigade his locomotion is achieved in a unique way, akin to a puppet (his servants control strings attached to his