You Wouldn't Like Me When I'm Angry: Culverton Smith and Colonel Moran have to find this out the hard way. It's really not a good idea to make the Great Detective mad at you.
Dark-Skinned Blond: The personality aspect is inverted, but the actual coloring is played straight. Watson is described as having ginger-colored hair along with a permanent tan.
"Porlock, there is no use in arguing the point. I shall search for Holmes. Whether you help me or not is your choice, but you shan't stop me — you have my word on that."
Gray Eyes: Usually described as being "near-white". Also a Family Eye Resemblance, as it's one of the three physical traits shared by the Holmes brothers.
Wise Beyond Their Years: Davy is just 22, but he tends to act older (and, in some cases, wiser than his own employer). Though he has a mother and a home, he worked as a beggar and pickpocket before being hired by Holmes.
She raised an eyebrow. "John, in the event that you have somehow forgotten, I am now quite capable of defending myself. You made certain of that, and I believe I proved myself last Christmas."
Rose Hudson
Love Hurts: When her characterization finally starts coming through in Mortality, it's when she's acting very much like a surrogate mom to a very damaged Sherlock Holmes.
Team Mom: Very much on the sidelines, but still there.
Brainy Brunette/Child Prodigy: Annie is incredibly well-educated for a working-class woman, having largely taught herself through books. She can speak several languages aside from her native ones: French, German, Italian, and Breton, as well as classical Greek and Latin.
Breakout Character: Annie was intended to be used extensively as the series progressed, but the unexpectedly enthusiastic response to her initial minor appearances in Mortality led to more scenes than originally planned.
Adult Fear: Of all the characters, he's the only one to truly fear for the Irregulars' safety. As the main page says, considering that he's friends with at least one, has another among his constables, and has a nephew in their ranks, he has every right to feel a parental horror at the boys putting themselves in danger.
Watson:(concerning Moran) I think you'd know him if you saw him, Lestrade. The man has a presence. Lestrade: Well, then, that limits our man to half the men in that room. Come along, let's get you back out there.
Only Sane Man: Whether he's interacting with the rest of the "Five-Man Band" or his own colleagues, he is so very much this (even when Watson's around).
Gregson:(concerning Patterson) Have to admit, I've always wondered what it would be like to have Sherlock Holmes as One of Us. Now I don't have to wonder, and I don't like it one bit.
Dumb Blond: Inverted. Gregson is the Sherlock Holmes-acknowledged smartest man at the Yard.
Lestrade: Come off it, Tobias — you look like a thunderhead about to erupt. Gregson: Volcanoes erupt, Ferret Face. Thunderheads burst. Lestrade: What's going on in that bright head of yours, other than the incessant need to demonstrate your superior knowledge?
The McCoy: Surprisingly so, but Patterson seems to bring out the trait in him. (Canonically, Lestrade and Gregson are more like The McCoy and The Spock, respectively - even in Mortality, they go back and forth as needed.)
Gregson: [Patterson] could have had enough consideration for the poor Doctor to make his announcement less abruptly.
Hero of Another Story: He's spent most of his career - fifteen years at least - investigating Moriarty.
Icy Blue Eyes: Often described from Lestrade's Point of View as icebergs or chips of ice, with just as much emotion.
Insufferable Genius: So much so, in fact, that Sherlock Holmes actually decides to cut back on his own arrogance whilst around Watson and Lestrade in the future!
Ascended Extra: Word Of God states that Sean is actually the Inspector Youghal mentioned in "The Mazarin Stone". Mortality takes place twelve years before MAZA.
The Man Behind the Man: To the Red-headed League, Culverton Smith, and purportedly many others.
Odd Friendship: Played with. He trusts Moran more than anyone else of his subordinates, but he makes it very clear that Moran is a subordinate. Their dynamics are pretty much as "fire and ice" as it gets.
Moran: “Professor, I do not enjoy disobeying your orders. But I could not, in good conscience, carry that one out. Not at that time.” Moriarty: “And what does that make you, Colonel? A soldier with a heart?” Moran: “I hope so, sir. It would be deucedly difficult to live without one.”
Deadly Doctor: Played with, as he has all the knowledge of a Ph.D. without actually having acquired his doctorate (or even an M.D.) due to financial difficulty.
Evil Uncle: Out of Greed for his half brother's estate. Called out on this by the Big Bad, himself.
Serial Killer: Officially called a "multiple murderer" and unofficially labeled a Complete Monster by Holmes himself.
Dark-Skinned Blond: Like Watson, the personality is inverted, but the actual coloring is played straight, with Sharon's skin being described as much darker than his "corn silk" hair.
Tranquil Fury: Upon learning of Holmes's captivity and Moran's hand in it, Sharon is described as being quietly outraged.