Perhaps the thing that most surprised Sherlock Holmes was the incredible ability of Saleah Gaiffin to ignore people. While most girls of the awkward age of fifteen cared about boys and makeup and clothes and shopping, Saleah neither cared about those things nor really knew what they were like because she could never bring herself to actually try them. Instead, ever the great scholar, she was in college and doing better than most adults.
Sherlock actually met Saleah at the morgue. As she rushed into the room where Molly Hooper busily examined bodies, she threw a school bag on the nearest table(where Sherlock was trying to work). Reaching her hand out and brushing a large stack of records off the table, she announced, "I'm so careful with things." And Molly Hooper glared. Ignoring the reaction of everyone's favorite pathologist, Saleah proceeded to sit down and grab a bottle of chemicals. Sherlock glanced up but said nothing.
Born and raised in America, exchange student probably. Fifteen years of age. Brilliant scholar, expert chemist. Master of deduction and manipulation. Criminal knowledge exemplary. Extensive self harm scarring suggesting emotional abuse and boredom or at least not feeling at home in the world.
His train of thought was rudely interrupted when Saleah loudly slammed a jar of blood on the table. "Did you take my liquid nitrogen?"
Well. What an interesting child.