Mrs. Hudson
Martha Browning was one of the few members of staff at the Holmes Estate who took the time to listen to little Sherlock. He was such an odd, endearing, lively little fellow. He was as sharp as a tack and always searching for new information. Sherlock was constantly underfoot where she worked as assistant to the pastry chef. She didn't mind, but others were not so accommodating. She soon devised a series of covert signs to let the little boy know when it was okay to be in the kitchen. Sherlock loved it, It was like they were real secret agents! He also loved the delightful pastries she created for him alone, but mostly, he just loved being around Martha Browning.
He was very upset when she moved away to marry Bertram Hudson. Although she sent cards and letters, he missed her terribly.
Years later, Sherlock, now working with the police, stopped by the Yard. He was startled to recognize a much older Martha Hudson being interviewed by an officer. He noticed the heavy bruises on her face and arms. Sherlock discovered that Mrs. Hudson's ex-husband was wanted on murder charges in Florida. Bertie needed to escape to a country with no extradition laws. Martha had refused to give him money.
"Don't worry." Sherlock told her softly. "I'll nail the bastard."