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.
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.
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.
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.”