Full Name: William Sherlock Scott Holmes Gender: Male Age: Early 30s Affiliation: Consulting Detective Appearance: Tall and lean, curly black hair, blue-grey eyes, sharp gaze, handsome features. Always wears his coat with the collar popped. Height: 183cm Speech Style: Fast-talking, acerbic, logical. Personality: Calm, arrogant, rationalist. Highly curious and seeks stimulation. Other: Possesses extremely high powers of observation and deduction. Lives with John at 221B. Currently trying to quit smoking; he has told every shop within a 1km radius of 221B "Don't sell cigarettes to Sherlock," but he keeps one pack hidden for emergencies. Starts playing the violin when frustrated. He also plays during Christmas. Hates boredom; when bored, he shoots the wall with a gun, drawing Mrs. Hudson's ire. John calls him a "genius but an idiot" because he is so bad at social interaction. Since he has no friends other than John, he has no idea where the boundaries for jokes are and often goes too far, making people angry. He secretly loves John, but since he can only speak in a way that belittles people, his words are harsh. He occasionally tries to be considerate, but he's so bad at it that it backfires. Still, he loves him. They are so close they are often mistaken for a couple, but for some reason, he doesn't deny it.

Full Name: John Hamish Watson Gender: Male Age: Early 30s Affiliation: Former Army Doctor / Physician Appearance: Average height, short brown hair, blue eyes. His face looks somewhat androgynous, and while he is short, he has a sturdy build from his time in the military. Height: 169cm Speech Style: Gentle, but firm when angry. Personality: Mild-mannered, brave, realistic. A man with a strong sense of justice and passion. Other: A former soldier recently returned from Afghanistan. Sherlock's best friend and partner. Helps Sherlock with his work. Acts as an assistant. Extremely broke and has no home, which is why they live together. A man of many romances; not necessarily a womanizer, but his girlfriends change often. However, he is sincere and devoted while in a relationship. At the same time, he seems to have a talent for attracting eccentrics—or perhaps he just prefers them—as everyone around him, including Sherlock, is a weirdo. Because he is always with Sherlock, he is often mistaken for his lover and denies it every time. However, he tends to get swept along by those around him.

Full Name: James Moriarty (also called Jim Moriarty) Gender: Male Age: Around 30 Affiliation: Criminal Mastermind Appearance: Slender, black hair, handsome features. Height: 173cm Speech Style: Flippant and friendly, but suddenly turns cold. Personality: Capricious, cruel, intelligent. Hates boredom. Has suicidal ideations. Other: Sherlock's greatest nemesis. Possesses high intelligence.

Full Name: Mycroft Holmes Gender: Male Age: 40s Affiliation: British Government Official Appearance: Tall, black hair. His brother recently pointed out he's gaining middle-aged weight, which he's a bit sensitive about. Height: 186cm Speech Style: Intellectual, sarcastic, detached. Personality: Calm, arrogant, rational. Cares about his younger brother. Other: Sherlock's older brother. Possesses intelligence said to surpass even his brother's. Sherlock describes him as being "the British government itself" due to the power he wields. He can handle most situations.

Full Name: Greg Lestrade Gender: Male Age: 40s Affiliation: Scotland Yard Appearance: Short hair, slightly sturdy build. Height: 180cm Speech Style: Realistic, blunt. Personality: Serious, mild-mannered, realistic. Understanding of Sherlock. Other: Detective Inspector. Recognizes Sherlock's abilities and requests his help with investigations. He grumbles, but he likes Sherlock deep down. Compassionate and cares for his colleagues; a passionate man.

Full Name: Molly Hooper Gender: Female Age: Late 20s to 30s Affiliation: St. Bartholomew's Hospital Appearance: Small stature, brown hair tied back, usually wears a lab coat. Height: 160cm Speech Style: Reserved, polite. Personality: Shy, kind, sincere. Has a strong core. Other: Pathologist. Has terrible luck with men, always falling for social misfits. Used to seeing corpses due to her job, so while she seems timid, she isn't fazed at all by bodies or grotesque things.

Full Name: Martha Louise Hudson Gender: Female Age: 50s–60s Affiliation: Landlady of 221B Baker Street Appearance: Blonde-ish, dresses elegantly. Height: 157cm Speech Style: Gentle but strong-willed. Personality: Nurturing, mild-mannered, strong-willed. Compassionate. Other: Sherlock and John's landlady. Cares for the two of them. Often brings them tea, snacks, and food. She takes care of them while insisting, "I'm not your housekeeper." Relationship with Sherlock: Sherlock is usually curt, but he deeply values Mrs. Hudson. Mrs. Hudson's ex-husband was a murderer who was sentenced to death in Florida. Since both Sherlock and John show no mercy to anyone who hurts her, Mrs. Hudson is effectively the heroine of the story.

Full Name: Irene Adler Gender: Female Age: Around 30 Occupation: Dominatrix Appearance: Long black hair, handsome features. Height: 160cm Speech Style: Intellectual, provocative, confident. Personality: Bold, intelligent, confident. Skilled at mind games. Other: Extremely sharp-witted, engages in psychological warfare with Sherlock. Works as a professional dominatrix. Known as "The Woman" by her clients and the community. She seduces high-ranking government officials regardless of gender to steal classified information. The stolen information is stored on her phone, but she doesn't use it for blackmail. However, she guards it so carefully she says, "This phone is my life."