One: Willikins
Willikins' arms were covered in tattoos, which he always kept covered up.
So of course the one time he needed to push his sleeves up was the one time a five year Little Sam came wandering into the kitchen, and her eyes immediately fixated on the slightly faded colors on his arms.
"What are THOSE?" she said, awe in her voice. And Willikins meant to tell her to run off and play outside but those big grey eyes were looking at him…
That's how Saul came in five minutes later to see Willikins making the lady on his bicep dance and his daughter giggling madly.
Two: Cheery
Little San LOVED Aunt Cheery's beard.
Before she got too big to sit on her lap while she did her paper work, Little Sam loved nothing more than to hide under Cheery's beard and pop out and hide again and pop out.[1]
When she was a little older, Cheery let her braid her beard, and that was how Little Sam learned how to do hair.
And how Cheery one day inadvertently started a trend among Ankh-Morpork's lady dwarves by showing up to a crime scene with her entire beard done up in hundreds of tiny braids.
Three: Nobby
It was only because Vimes had moved beyond the point of utter desperation.
She needed all of the officers she usually had sit baby Sam with her to deal with the riot off Treacle Mine Road between the Dimmers and the Miners after a game ended even more badly than usual.
And there was no time to send for Saul.
So she put baby Sam in Nobby's arms and in a voice usually reserved for making prisoners wet themselves told him to take care of her Or Else, and went off to deal with the riot.[2]
Nobby looked down at Little Sam. She had that brownish red hair that Lord Saul called 'auburn' and Nobby always thought of as 'brownger'. She stayed sleeping, moving only to wiggle into a more comfortable position against Nobby and to start drooling on his arm.
He couldn't remember the last time anyone had trusted him with anything, let alone a baby.
And Nobby looked at Little Sam, and an odd wobbly bit inside him went "squish".
So Nobby found a chair, propped his sword next to him in case, and Sam came back an hour later to find both of them snoozing, her daughter's drool snaking a clean path down Nobby's armor.
After that, while he still wasn't her number one choice, she let Nobby look after Little Sam too.
Four: Angua
Most people, Angua had found over the years, reacted with disgust or horror when they found out she was a werewolf. Or both.
Little Sam, once she was old enough to make the connection between the golden blur she sometimes saw chasing criminals in the street and Aunt Angua, thought that Angua being a werewolf was the most amazing thing ever.
Of course, this meant that Little Sam, being rather intelligent for her age, always was bombarding her with questions about what she smelled, and wait you smell in colors when you're a wolf, what color am I, is Mummy's colors red, and so on and so forth.
"Lass, give Aunt Angua some air," Vimes told Little Sam once after an extensive session of bouncing around and asking questions.
Angua smiled and shook her head. "No, I don't mind." From most other people, yes.
From a little girl who simply accepted who she was, who was never scared, she would always answer any question.
[1] Sam told Cheery to scold Little Sam if it bothered her but the dwarf waved it off, saying she often did the same when she was little.
[2] The rioters, many of whom were tall, burly and drunk, were soon to find out that what Sam had in none of those departments, she made up for in anger, fighting dirty, a sharp knee[3], and more anger.
[3] one of the good things about being a female Watch officer was that the unspoken "no-unmentionable hits" rules that usually occurred during fights between male officers and nicks went totally ignored by them.